feeling disgusting

I broke up with my boyfriend of 8 months recently. I feel like I caged myself a lot and as time goes on I keep feeling more and more disgusting. I see him in class and he's just rude and gross and so so immature. He's just so weird. Every word that comes out of his mouth irritates me so much. He didn't dump me, I broke up with him because the bad way he was treating me finally made me do it. I feel so gross thinking that he touched me, and that we had sex. I hate that he took my v card. I hate him. I wish none of this ever happened. Now I just feel like I don't deserve anything good. Like this mistake was fatal or something. Have any of you ever experienced this or something like it?