Am I bi or gay?

Currently in a relationship with a man, I am in love so potential for some longevity. I obviously know I like dudes, but do I also like girls? I have had girl friends in the past, never any that i fell in love with. I definitely liked them, but we never had sex. I remember grinding up on my girlfriend of the time. I liked it. There was also once time this girl gave me a blow job, I came. I also ate her out on multiple occasions and it was enjoyable. This was in high school. Sometimes I consider the possibility that I am too afraid to just say I am gay, but if I am I convinced my self I am not.