Step brother interest

So I have a step Brother whom is 11 years older than I. He knew me only for the first few years of my life and ended up never talking again. Im 21 now. Just recently I decided to contact him. For the first time in 20 years. But lately ive been finding a very interesting atttaction to him. It isnt incest. And I never really knew him. I think with the large space given without really knowing who he is gave me a feeling of missing him to. Even tho I didnt really remember all of everything. I think he is a very awesome person and I feel like I can honestly connect with him in a way. I have never with some people. Please help.