Hi guys! Newbie here

I got a little problem and i thought you might have some advice.
My parents are separated and i live with my mother and her partner. (My older brother lives with my dad since last week though) I am out to everyone, and last week I wrote a letter to my dad about me, because I was 100% sure he wouldn't accept it but I thought he needed to know.
He just send me a short message saying this is very weird for him now and he's got a lot of questions, and he would like to meet with me if I want to.(I made that offer in the letter) He also addressed me by my real male name and said he loves me.
And I know that's not a problem, BUT I was so sure that he would never react in a positive way, because he always was a pretty intolerant and ignorant person (also in regards to my brother and me) and I also told my mother that I don't expect a (positive) reaction at all. She said he might react kindly, but only to hurt her, because my dad and I didn't have a very good (or: nonexistent) relationship over the last months, and now he's got the chance to act like world's best daddy by pretending to accept me as his son. When they were newly separated he didn't pay child suppert for me (he does now, because I went to the youth welfare office and they contacted him), so i understand where she's coming from. But he is still my dad, you know, and if it is genuine interest in me, I would make a huge mistake by rejecting him. And I really don't want to hurt my mom, because she is the most supportive mother one could imagine.
So my question is, what would you do?
(And I apologize for my bad English, it's not my first language.)