please Help Confused n Sexuality?

[Emily]

I've always liked guys, but I've never had any luck with them. Girls however are a different story when i was younger me and a friend of mine would fool around. Then When i was a sophmore in highschool a friend of mine who was bi came over and we fulled around leading to us fingering eachother. She gave me my first orgasm. I can orgasm watching both straight and lesbian porn when it's on. I'm just wondering if I'm bi or if i feel this way becuase I've only ever been with a gir. I"m very confused about this. I'm 19 now and stil have no luck with guys. I'm wondering wether i should be with a girl again or what. Please help. I still can't believe me and her went that far becuase my family was downstairs while this happened. in the spare room with a blanket covering the floor.