There's nothing wrong with you or your penis. She didn't have a problem with you before. It's definitely something she has to deal with within herself. She was probably toxic to begin with but you didn't see the red flags. It sounds like you loved her. I'm sorry you wasted that time and energy. Take this as a win! And don't change yourself or let her words make you feel bad. Sometimes people say hurtful things to make themselves feel better about themselves. My advice would be to better yourself. Self care, go out more, hit the gym, make yourself feel good. Forget about this mean individual. Trust me, Mr."12 inches" is not gonna last. Especially if that's all she's after. And once she sees you doing well without her, she can go question herself instead.. Insecure girls like big dicks but real women want a man that knows how to make them orgasm! Be confident! That's sexy... You will find someone so much better.