Help me.

Alright I'm so confused. I'm straight for the most part I guess I am attracted to girls physically and sexually. But my best friend and I always hang out I even went on trip with him and his family to myrtle beach a month ago. As of lately I have been really attracted to him and him only. No other guys I find attractive but him. And I've been wanting to have sexually acts with him. Every time I'm around him now all I can think about is how hot he is and how I want to give him a bj. Am I gay or bi? This is the only guy I feel this why about.P.S. I've been watching a lot of gay blow job vids since it all started.