found on fb by father??

So my possible biological father found me on fb. And sent me a friend request. Now I say possible because there is no test to confirm if he is my biological father but, all things match up so I'm sure it's him. Anyway. He was never around but he claims that when he lost track of me and my mom he tried to find us.  He said he lost hope for a bit and then gave up. But then he tried again and found me on fb. He wants to get to know me and wants me to get to know the other family I have where he lives but idk. I kind of want to but I have always had my mind set on never want to talk to him if he were to find me or if my family had found him. I don't know what to do. Part of me is angry that he did find me since I was doing so well without him. But then again a very very very small part of me thinks that I should get to know him. I think the only reason I feel I should get to know him is because I don't want to seem like a bitch. But I just don't really have any desire to get to know him. I kind of have some questions to ask but I would never know if he was lying since I can't ask my mom because she passed away. I have no clue what to do.