I've noticed a pattern in all my 'relationships'.
Someone shows interest in me. Even if I'm not sure I get used to the attention and start to like them back. Then they back off usually for legit reasons, but by then I really like them.
Then it ends, but I can't let go. I'll agree to be friends, have sex with them etc as I can't let go of the attention. Then gradually their interest wavers forever and I feel terrible about myself. I don't really miss them but feel it's a reflection on me that they used to be so into me and now they're not.
Why do I do this and how do I break the cycle? All it does is cause my massive amounts of hurt, when I'm still pining after they've moved on.