My boyfriend barely told me, after a year of dating, that he has a seven month old daughter.?

After having a huge fight and talk about breaking up, we both finally came to an agreement to make it work out- I told him I accept it, because I am divorced and it wouldnt be fair for him to accept me and me not to accept his daughter. What the heck do I do though? Im so afraid and trying to handle it maturely, but I dont know where to begin. Im hurt and angry he didnt tell me before, which he didnt for fear of me dumping him. He is very far away right now, the same city as his ex and daughter. He is coming to live in Phoenix AZ where Im located, so he wont be there- but even if I wanted him to myself, I wouldnt feel right for him not to be in his daughters life. Does anyone else have a similar story? Does anyone have ANY advice for me? Im so lost.