I was seeing this guy for like 8 months and he broke things off because he said he didn't feel like he had enough time for me and wanted to focus on his career and stuff and I understood that and things were going well between us until he told me he hooked up with someone TWICE

So he has no time for me but time to be with someone else.  I feel so hurt right now it makes me sick to think all the times he said he was busy he could've been with someone else.  They even all hung out with his roommate like we used to do.  Then him and his roommate would have me over and act like nothing had happened and he would tell me in his top priority and he wishes he had more time for me 

I feel so stupid for trusting him.  I usually have trust issues with people but with him I felt I could trust him.  I feel betrayed and I feel like I've been replaced and idk what to do.  He says he still wants me in his life and I can't imagine my life without him but idk if I can handle this.