Anna,
I don't know why you are meeting up with your brother, whose idea it was, or what created the gap to begin with. I hope things go well. But, more importantly, I hope you find peace or answers that will help you go forward with things, either with him or without him. Life is so hard, and while it is "too bad" you aren't or weren't in a close relationship, maybe there is a reason. I hope you get from this meeting that which you need, let go of that which causes you turmoil, and learn something about yourself.
Good luck,
Johanna