Am I (20f) his (24m) rebound?

Tl;dr I (20f) have been friends with this guy (24m) I’ll call Scott, for over 8+ years. We met at a concert years ago and just kind of hit it off. Well I’ve had a crush/been in love with him for years. We dated once back then but it didn’t end too well. Needless to say he isn’t the “best guy” as he is schizophrenic, has had addiction issues, (not anymore) etc. but no matter what I’m always there for him no matter what. He recently lost his job, got sick, lost his gf. And I feel like he’s pushing me away now too. He knows I like him and for these 8 some years we have been off and on fwb. But everytime he will unexpectedly text or call me during and say, “I have a gf we need to quit.” So we do. And every time it breaks me more and more. Does he just like hurting me? Am I a rebound? Or is he just dense?