So I had sex with my boyfreind the other night. We had sex for about one to two hours, and afterwards he said that his penis felt a burning sensation, plus the condom broke. The next day his penis was sore and the skin was irritated, i told him that I was irritated too and that the sex we had was kind of rough, I figured its a friction burn. i was recently tested for STDs like three months ago and came up clean, and havent had sex until now. So we went to have sex again the next day and had to stop becasue he said it burns. Its been three days now and he wont even talk to me, Im fearing he thinks I gave him an std, but since everything was fine until right after we had sex Im sure its not an std, plus i am clean. I dont know what to do. How do I talk to him about it, how can we prevent it from happening next time? What facts can I give him that he didnt contract an std from me?(such as the difference between an std and friction burn.)