Help!!!

My boyfriend and I have been together over 2 years. He was my 3rd. Neither of us had that much experience but sex in the beginning was great. I never really liked trying new stuff because I would always end up hurting but we were always able to both finish (I would multiple times) and had sex a few times a week. Now we barely have sex at all. Like not even twice a month. It always hurts and/or I can't finish. It's like no matter what he or I do I cannot find any pleasure. It's tearing our relationship apart because both of us end up mad and frustrated. Right now I am on our couch crying while he's in our bedroom upset because I got so mad.  I just don't know how to fix it. Any help or advice would be appreciated.