Sex after a miscarriage.

I had a missed miscarriage in march. And I am still super torn up about it. I don't laugh like I used to, I can't get myself to have sex with my boyfriend, and we fight constantly. My friend who had a miscarriage said she couldn't get intimate after her loss either. But I'd like to know how to over come it, or if I'm not alone in this. As much as I'd like to do it. My mind just doesn't allow me to let go.