How to learn to enjoy sex again?

Long story short I was sexually assaulted in the end of June and my boyfriend has been such a life saver with helping me get through it. Before it happened I really enjoyed having sex with him but now its like I have to pretend for my own sake that I really like it, because if I do “then what happened to me isn’t serious and didn’t define me and I will enjoy sex no matter what” kind thing. Don’t get me wrong, it feels good but my mind goes all over the place or I’m so focused on having “sex” that I can’t really get into it. At first I kept pressing him to have sex because I wanted to prove something to myself but it was just stupid. Idk what to thing. Any ideas?