help how do i stop loving her

hey so basically this is my burner so no one finds me.
also, this is going to be a long one so please bear with me.

I met this girl a year ago and ever since then she has made me the happiest man alive everything about her makes me happy and lucky I asked her out last September she rejected me and said we should stay friends. As the down-bad person that I was, I told her to find our friendship was very rocky until one day we just got close. ever since then we were best friends I thought I was completely over her and she told me that she loved me and that was the happiest day of my life. whenever makes me feel special and gives me hope that someday she will end up with me she would tell me about this other guy she is talking to and how she loves him and all of that I rethink why I talk to her and when she has troubles I’m always there for her and she rants to me and tells me how everyone does her wrong. what she never realizes is how much I love her I accommodate my life for her as I’m available whenever she needs me to be I ask her if she ate if she is feeling good and what she did in her day and how much I love her. ik at this point I’m down horrendously but Idk what to do about it. she always tells me how much she loves this person that person when they do smth to them that’s nice but I rarely get appreciated for doing the same thing. I love her so much and I don’t think she wants me no matter what i do l I never seem to be an option for her even tho her dream guy is practically me. ik I need to let go but how do I? every single time I try she seems to win me back.