Ugh idk what to do

I used to be a really trusting person. I had lots of guy friends. Which is fine. But then they all walked out. When I needed them most. And every time I swear never to trust another guy. Yet. I'm falling for and trusting a fuckboy. I know he's just going down a list of girls. And he can be really sweet. But then he's just being a player. And idk what to do. I'm trying to get over him, I just can't. And I don't want my heart to break again.