Hey am 19 and I've been with my girlfriend for 2 years now and we've always had sex normally. One day we were going to have sex and I just didn't get hard my girlfriend was very sad she thought it was her I told her otherwise and she understood after that time we had sex and it was fine for a while Till it happened again she was pissed off and insecure about me I really love her and don't want to loose her but I don't know what to do about my problem I hope this doesn't continue I want advise please help me I really need it

Men do not always perform, stress, medication, and just does not always work just right happens. If she is so insure and thinks it is all about her, she does not understand, and this is just the beginning of problems if you two can not communicate and if she does not understand it better