My ex boyfriend broke up with me because he’s not ready for a serious relationship, but we have still carried on as before, I don’t want to lose him?

Basically we dated for over a year, awesome relationship, hung out all the time, great sex life, compatible etc. but then he broke up with me out of nowhere because he said he wasn’t ready for a serious relationship this young (22). Since I love him so much we continued talking and now we act just like we did when we were together. I’m with him all the time and have his passcode so I know he isn’t seeing anyone else. Sometimes I confront him, but he always just says he still feels the same way but he loves me and still wants me around. I know I’m stupid for continuing it, most of the time I pretend we’re together and I’m happy but at times like right now I start thinking about how he won’t commit to me and how I know this is just going to end in heart break. But he is my best and only friend, I have no one else and I love him so much, every time I try to walk away from him my heart hurts so bad and I miss him so much it’s like I can’t breathe. I know this isn’t healthy and I know I’m stupid but I just can’t leave him, I’m already so depressed and I don’t think I could handle losing him. And I definitely couldn’t handle seeing him with someone else. I’m at a loss. I feel so alone. I know realistically the only healthy option is to walk away but I’m terrified. He is all I have please help me
My ex boyfriend broke up with me because he’s not ready for a serious relationship, but we have still carried on as before, I don’t want to lose him?
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