I'm so confused and hurt can you guys help?😭

Me and my boyfriend have been together for about a year...I am not ready for a sexual relationship yet although he is not a virgin and has had plenty of experience. Just recently I found out that he had, had sex with a girl i had never seen before at my school. She was so ugly and she is just an easy hoe she has had sex with everyone in the book and is just easy unlike me. I just broke up with him recently but he keeps texting and calling me. It is so hard to resist them I still like him and want him but..I can't trust him. So I just don't know what to do.