You have to rationalize. If the sight of that person makes you happy, then it becomes your duty to make them happy. Precisely so that his happiness becomes your reason for living. Alas, if it's another person who made her happy, that completely disqualifies you.

And as love falls on us, you can't expect it to fall on the other…so you can't impose your love for her if it's not reciprocated. Otherwise it will no longer be called love but selfishness… And frankly, nobody likes that, let alone falling in love with it…

That said, women like it when men go out of their way to win their attentions… So nothing is lost…

I have never been in this situation. But I was in the situation "How to stop loving someone who no longer loves you" it's the same thing (with a few details).

The one and only solution is the click. OR in other words "awareness". It's like this light that we see at the bottom of the tunnel, which allows us to see more clearly around us.

This click, does not allow us to get better for all that.. but it allows us to assimilate, to digest the thing, and to say to ourselves "well ok, that's how it is, that's how it is. You can't do anything do it. Move on, live your life. And it will eventually go " .

The fact of understanding, of telling ourselves that the situation is like that and that we can do nothing about it, is a trigger, because it makes us understand that it is simply over. So instead of staying on this story, move on, don't stop. Don't put your life on hold for this. And you will see that over time it will get better.

Like I said, I've never been in YOUR situation, but I once loved someone who didn't love me anymore. And it hurts a lot. What hurts the most is that you don't know if you should give up or hang on...

You cling to this disappointment, instead of letting it go.

And basically you have to let her go, because deep down she's screwing you up. You love someone who doesn't look at you and looks at someone else. Who doesn't care about you, but who cares about someone else. It's a sad truth.

Accept, assimilate, move forward. This is the key.

I hope it will help you.

You are raising the question of lack or even emotional dependence. Very sensitive subject. Perhaps in the short or medium term, try to occupy your mind elsewhere; possibly - and it would be more unfortunate and more complicated at the same time - try to change your place of residence or even your place of work if you can.

5 Steps That Might Help

Can You Stop Loving Someone If You Truly Loved Them?

The love, as you feel it now, will change. Different people serve different purposes in your life. You can be grateful for the time you shared with this person and deeply care about them, then also move on romantically and stop loving them in the way you once did. Even if you were still with this person in a romantic way, the love would change, grow, or even fade away with time.

How Do You Leave Someone You Still Love?

1. Accept The Love You Feel
2. Stop Idealizing
3. Focus On You
4. Speak With A Counselor
5. Don’t Worry

I'm sorry to hear that you're in this situation. I can't speak to how to unlove someone, but I can offer some advice on how to deal with the emotional pain of loving someone who doesn't love you back.

It's always hard when you love someone and they don't love you back. It takes time and emotional energy to heal from a situation like this.

There are many ways to unlove someone. The best way is to stop thinking about them, but this is easier said than done. You could also try to find someone else that you love. If you can't, then it's possible that the person you're trying to unlove is not worth your love in the first place.

It is difficult to unlove a person you love. You may be able to do it if the other person has been abusive or hurtful. However, it can be difficult to do this without feeling guilty. The best way to go about it is to spend time with people who make you happy and try not to think about your ex as much as possible.

People come and go, and relationships change. It might feel now like you can never love again. But you can. It might feel now like you can never stop loving this one person. Still, you can.

Practice mindfulness and meditation to become more aware of your thoughts and feelings. 

Reference: https://www.quora.com

    

I'm not sure about the emotional mechanism behind this but I do know that it's not possible or at least difficult to unlove someone you already have feelings for. Love is unconditional and so, despite wanting to, you're going to find yourself being inclined toward them and noticing the minor details about them. 
Although, if they don't return your feelings, make sure that you put yourself and respect first. And particularly, if they are interested in or committed to another individual, it is best to step aside and let them be happy. Someone who destiny has written for you, you won't have to steal them from the arms of a third person. Let them go...there is someone else out there for you and if that someone else is them, they will come around to you. 

Stopping your feelings for someone can be a difficult and complex process, especially when the person you love has feelings for someone else. Here are a few steps you can take to try to move on:
Acknowledge your feelings: It's important to acknowledge your feelings and allow yourself to feel them. It's okay to feel sad or hurt, and it's important to give yourself time to process your emotions.
Take some distance: If being around the person you love is making it difficult to move on, it may be helpful to take some distance from them. This could mean spending less time with them, avoiding situations where you will be around them, or even temporarily cutting off contact if necessary.
Focus on yourself: Take this opportunity to focus on your own personal growth and self-improvement. This can include pursuing hobbies or interests that make you happy, spending time with friends and family, or even seeking professional help if you're struggling with your emotions.
Practice self-care: Taking care of yourself is important during this difficult time. This can include eating healthy, getting enough sleep, and exercising regularly. Engaging in activities that make you feel good can help boost your mood and overall well-being.
Consider therapy or counseling: If you're struggling to move on, therapy or counseling can be a helpful resource.