I am dating a guy who loves me, but I still cry over my ex…

I am a 19 years old girl,doing my 2nd year in Varsity.I had been in a relationship with my current bf for 5 months now but still cry over my ex. I dated my ex for three years (from 2010 to 2012) nd He even introduced me to his family.Everything was goin well between us until I fell pregnant with his baby and had a miscarriage. That’s when he started distancing himself from me. He even cheated on me with this other girl immediately after I told him about my miscarriage. I was hurt but blamed myself because I thought I disapointed him by having a miscarriage. We den broke up nd both dated other people but it didn’t last for me as I didn’t love the other guy. I waz only doing it because I waz depressed. We reconciled with and within 2 months I fell pregnant again. I was happy but he was not and I was forced 2 abort nd after da abortion we broke up. I am now dating this guy and he really loves me ,but I still cry over my ex nd whenever He wants 2 have sex with me I find maself crying coUs i think of my ex..Izt right 4 me 2 do dis 2 my current bf?? Xuld I reconcile with my ex?? Pls help