Lost and confused

My fiancé decided the day of our baby shower that he didn't want to be with me anymore.. Long story short he liked me years ago and I was not ready for the commitment he wanted .. He never used it against me but we remained good friends and close then when I decided to want to be with him we pursued it I became pregnant and he proposed to me.. Out of the blue he chose to tell me he feels used all those years he waited for me and can't be with me because he feels like I can do that again to him.. He requested his space I'm 8months pregnant I'm heartbroken angry and I don't understand what I've done wrong.. I'm spending my day off from work moving out of our place because he does not want me there he chose not to show up to our baby shower and went as far as uninviting his guests.. I have known this man for 4 years and I have yet to meet any of his family and they refuse to acknowledge me let alone my son .. I don't know what to do at this point..