I'm going to break up with my girlfriend for not being feminine enough
Why don't you think she's feminine enough?
I'm an alpha male and I need a woman to fulfil my needs, but she doesn't even have big tits
You can be attracted to what you want. It is generally looked down upon for ending a relationship over someone's looks.
Being average looking your still a good person. I'm using her.
It's fine to know what you like in a woman, but why would you treat your girlfriend this way? You are being rather mean to her about her looks.