Woke up this morning with my bf giving me a bj?

My bestfriend spent the night last night because we were way too drunk to drive. I went to bed at like 1 oclock. I woke up at 2 am getting a bj. It felt so good I went with and ended up sleeping with him which included kissing. From what I can remember it was great. He said it was great too. I'm nervous about trying this because I consider myself straight and I'm afraid to be gay, but another part of me tells me to do what feels best. Someone please help I'm not sure waht I should do?