Am i or bi? please help?

i'm very confused right now.a year or so ago i would have never thought about being gay, but a couple of weeks ago, my friend and me had a little experience where we just suddenly kind of started doing things wih each other and now im confused. weve actually done it a couple of other times since and im just wondering if this makes me gay or bi. ive enjoyed it to, if your wondering. also, could anyone give me a list of "symptoms' to look for? thanks for your time