How do i get my boyfriend back?

We was together for 4-5 years at the beginning he cheated on me and got another female pregnant long story short she claims she had a miscarriage we had a child he became controlling and overbearing recently cheated on him 3 months ago and he found out and broke up with me i would do anything to get him back and have out family back but he wont give me a chance he says that he don't know that i wont do it again.when he cheated i gave him another chance and he change so how can he use that as an excuse not to take me back? when i was faithful to him for 4 years i just made an mistake...