Sexuality Shame

I am 18 years old and I am currepain in my first relationship with a female after many painful straight relationships. Something about her just made me fall head over heels and male or female I knew I loved her from the start. In past relationships I was terrified of anyone wanting to have sex with me, I found it appalling, but unfortunately I was sexually assaulted by two different guys that couldn't take a hint. Now here comes to my point. I don't know if I am bisexual or not. Did I just date guys because it was "standard"? My girlfriend asks me if I am attracted to men at all and my answer is this "I see people as people and I think everyone is attractive in their own way". So what do y'all think? I dunno why me declaring myself is bisexual feels so wrong, I feel like I have to choose.