HELP pls. I am 18 and have been with my boyfriend for over a year ..but couple months ago I kissed a... February 12 2014

Q: HELP pls. I am 18 and have been with my boyfriend for over a year ..but couple months ago I kissed a girl at a party when we were both a bit tipsy but fully aware of what was happening. Since then we've started to talk to eachother a lot more and kiss whenever we are alone..I don't know if I'm bisexual