My boyfriend and I have tried to have sex twice. Both times we failed because he was just too big and he went limp because he felt like he failed me. I feel so bad but inside, I feel like he failed me too. Now everytime I bring it up he becomes sad and distant. I want to prove to him that it's okay and we can still have sex somehow, but I'm scared that he may be too big and I may not be able to marry him. (My grandmother had to divorce her husband because he was too big for her) I tell him it's okay, theres always next time, but secretly I'm so mad at him.