How do you get over someone?

'm a 20 yr old female and three months ago i got out of a relationship of 16 months. He was my first real boyfriend before him i didnt see or feel the need to be in or define myself by a relationship. He was a bit older. 27 to be exact and i just loved his humor and intellect. So we began dating and mind you it wasnt love at first sight. It was very gradual. He always complained that i was a bit cold and not too affectionate and cos i liked him, i tried to change. Now, i always wanted to be a virgin till i got married and i told him this at the time and he was very supportive saying wasnt that important anyway. 6 months into our relationship he began to pressure me for but i didnt budge. The long and short of it is that on one occasion he d me and everything went downhill from there. I felt like i had to end up with the person that had with me first. Felt like i had to marry him so i stayed with him(A move i regret to this very day) and he continued to abuse me this way telling me he loved me. All the time i begged him to stop that i didnt want to have wit him but he wouldnt listen. and i was not strong enough to leave him. I found out that he was already in a relationship before i met him and when i confronted him he lied and said there was no one and i forced myself to believe him even tho i knew he was lying. Well we broke up. now i feel empty inside. He wants me back but i cant do that to myself again. I still want to be celibate till marriage. Im just one of those people who believe is for married people. Im very naive when it comes to guys. I feel like is it bad for me to still wanna wait even though i lost my virginity? Am i gonna have to go through the same thing with the next guy? I keep thinking about my ex despite the horrible things he did. Someone please tell me how to get over this. It makes me so sad.