How do you become a boyfriend of a girl of she already have a boyfriend?

Answer 1

When the time is right and they broken up wait a few months later. Get to know her better, make her feel happy, and ask her out when the days feel just the right to do it. If she says no, she doesn't deserve you. If she says yes, go for it.

Answer 2

It can be possible, although not normal, in some religions this is deemed normal, and many men even have a number of wives, it is possible although, I personally would not agree with this If she would date both of you then you would be being cheated on unless you already knew. But the other option would be to wait until they broke up.

Answer 3

1) Become friends with girl

2) Find way to make girl dumb her boyfriend

3) Be the shoulder for her to cry on

4) Get into her pants