i messed up bad with bad people around me i cheated on my gi...

i messed up bad with bad people around me i cheated on my girl when i was in another country on the otherside of world ,i admitted it because i was ashamed but obviously she was hurt,she sold my car and all belongings we have had a very patchy couple of years aswell we split for seven months under extreme circumstances we have a daughter of 18 months we managed to build a home for her in that time but we have the most extreme rows its been crazy i just wanna do right my daughter i have made mistakes and dont want to continue im 22 shes 25 does dis have anything to do with it maybe im not mature enough or i dont know why we cant get on help!!!