Can the biological father have his rights terminated since it has been over six months since he has seen the child?

The father has a history of domestic violence. I had to take him to court to enforce child support since they held contempt of court over his head he has been paying and visiting supervised at a facility. He continues to pay however refuses to have visits at the supervised visits instead wanting them supervised by his sister. In our agreement it states he has to complete anger management in order to have visits at his sister’s house. The last time he has seen his child was on her birthday in June 2016. My fiancé wants to adopt her. He is refusing to see her where he is supposed to see her? I ask about every two half weeks if he's able to visit at the parenting center and he says he's not visiting her there.