frustrating family members

Tweet

My boyfriend and I have a daughter together and he also has two daughters by his ex-wife. His ex-wife has used his daughters against him since the day she cheated on him. She was/is always talking bad about him in front of the girls. In all honesty he was addicted to his prescription meds for a while and wasn't consistent in the girls lives, but he was always available. He admits he has made his fair share of mistakes and has apologized over and over. I should mention that the girls are now 13 and 15. About two years ago his ex wife and her husband moved about 12 hours away. She called and gave him the address and her phone number. He was writing about once a month and got no response so began writing less frequently. Recently he began writing again, about one every or every other week. He just found out from a friend that his girls were in town about a month ago and asked their dad's friend not to tell him that they were in town. He was so hurt by this that he wanted to call his ex wife and give her what she asked for, sign away his parental rights. He believes that this is what his girls want. I told him that they have been braiwashed by their mother and that he just needs to continue to be the more mature one, continue writing, apologizing and telling them that you are here for them in case they ever decide that they need him. Can I get some opinions on this. Anyone ever have to deal with anything similar? What do you think he should do?