I hate sex so much that it's making me have panic attacks?

My last boyfriend was absolutely sex mad, we had to do it at least twice a day for him to be satisfied, but I always found it painful and unfullfilling. I haven't slept with my current boyfriend yet, I've been trying to avoid it because I don't want to associate this relationship, which i am really enjoying, with the thing that I hate so much. I know he won't stick around forever without sex but I am starting to have embarrassing panic attacks at home and sometimes in public when I think about it?