What's the best way to heal and deal with your mind and emotions?

At this point I feel tired and exhausted of this... I keep thinking about it, last time I saw my pwBPD was 30 december. She was cold and distant.

I'm put to much energy in my thoughts.

I keep thinking about her, about all the scenes, phrases and situations.

What could be different. I know deeply that isn't me the problem... I question it, but after rewatch all the relationship she was totally instable and creating drama for nothing. Never been so tired in my life.

She wanted me to be vulnerable with her, cry in front of her and all these type of bullshit, to end the relationship because "she was hurting me, and true love is not hurting someone. True love is distance to them if you are hurting your love".

In my opinion this thinking is manipulative and a way to clear one's conscience. That may be true in part, but in my opinion, you have to fight for it if you really want to be with someone, and she was clearly not.

Now I am dealing with this obsessive thinking, also due to the fact that almost the entire relationship developed in the neighborhood where I have lived my entire life.

She's practically my neighbor. She's living in the house near mine. I've never seen her before, she is not living in my city due to study (she moved for few years for complete her degree and that's makes me feel a little better), but I have so many memories and scenes here that's actually is even hard going out of my house.

How can I deal with all of that? This pain will fade away? I must to stop thinking about it or I just need to "let it be" my mind, and at some point it will stop?

Please help me because I don't know how to improve this situation and sometimes I am scaried as shit that I couldn't go out of the prison of my mind.