Amy94, I hope you can come to know yourself better without forcing it, and whether you're bisexual, or gay, or just extra hormonal, you can accept your true self (a lot of women have more fluid sexuality than men, and can identify as straight even thought they had feelings for women in the past). If you love someone, you shouldn't be ashamed of that. Nor should you be ashamed of experimenting.
To zobothehobo, I think you should cut the girl some slack. Your heart is in the right place, but sometimes the fear is just of losing your identity. When I started questioning myself, I felt this deep fear: How could I not have known who I am after all these years? I thought I was insightful! Amy94 may want to cling to the straight self that she has known for 19 years, rather than try out this uncertain new part of her identity.