I have had this happen to me where I really was into the girl and attracted but had problems getting hard or keeping it up. Had nothing to do with her, I really thought she was hot but was a combo of anxiety to perform with her, I also had a real bad porn addiction. The anxiety was I was thrilled she wanted to sleep with me, I kept trying to do oral and was frustrated I couldnt get hard and was trying to jerk it when going down so she couldnt see me doing this and the longer it took the more stressed I got which made it that much worse.... Needless to say I must have done well in the oral dept as she went out with me again and same thing happened and I even abstained and well as you can guess she didnt go out with me again.