Is my childhood friend gay?

[Nick Davidxoxo]

So I have this childhood friend. Let's call him Brad.
He's a bit older than me. Around 20 now. I'm 18. We haven't talked in a few years because we live a little ways from each other. I've always looked up to him and have always had a little crush on him. He was really into anime and Japanese manga and I was at a younger age too.
Well, the same year I believe, we went up north to my grandpa's cabin at the end of summer. One day when we were alone, he asked if I wanted to see him cum and see his penis. I said yes and he masturbated and cummed in front of me twice! Then and later that night. He also wanted to see mine and begged me until I showed him. He touched it but didn't do anything else. I liked it a lot.
I took it weirdly at first but then I realized I really liked it. I've started to like him a lot over the time we haven't seen each other. I looked on his Facebook and in his profile picture he was wearing a shirt that said "I'm so gay I shít rainbows". So is he gay? I'm unsure.