Lesbian or Bi

Hi throughout my teenage years I thought I was completely straight.
Even when I had thoughts about kissing my best friend as a teenager I never considered that it was gay, I justified to myself that it would add an interesting dynamic to our friendship. Plus we always thought we would be friends forever so who needs a boyfriend.

During my first year of high school I noticed that all of my friends had crushes on celebrities and would talk about which boys they liked. I simply assumed I wasn't ready to date and thought I hadn't met the right person. When I was asked which guys I was attracted to I would respond that I wasn't interested in any of the guys at the school, my friends thought that was weird and said I must be a lesbian. I was indignant. I was highly insulted that they would even say that about me.

During my senior years of high school I still was not attracted to any of the guys around me and simply assumed that I would meet someone eventually and love would hit me. However since I was blonde, blue eyed, with large boobs and was short. I was considered attreactive to the guys and was consistently asked out by guys a lot. Mainly because I get hit on by old men a lot I formed the opinion that guys who like me are perverts.

Because I thought that the guys who liked me were complete perverts anybody that confessed to me or hinted that they liked me instantly lost my respect and to be honest I instantly rejected them and treated them badly.

Thoughout high school people still would say that since I had no interest in guy I was a lesbian.
Once I entered university I met several of my closest friends who are gay and I feel very close to them.

It was only last year when I changed university courses to one that is primarily taken by women that I slowly started to realise my attraction. It was a slow realisation over three terms. My first term I was embaressed to realise that I couldn't stop looking at my lab partners chest across the table. This was a shock to me and I studiously looked everyone in the face for that term. During my second term I became close friends with the girl that I kept checking out during labs and thought it was really strange when I was dissapointed to hear that she had a boyfriend. Third term it finally hit me that maybe I wasn't straight. And now it has almost been half a year since that discovery and I realise that I like girls.

I feel comfortable with the idea of dating a girl, when I agreed to date one of my friends who I thought I could learn to like, he was reasonably attractive. I felt like I had made the worst mistake ever. Like I had condemned the world kind of feeling and spent the rest of the week trying to break up with him. I haven't tried to date anyone since because I didn't want to put myself in that position again.

My question is do I even like boys, but I have to right since I spent 21 years of my life believing I was straight. Sorry if this was mlong and confusing, I am not sure what to put down. I will clarify on anything if you have questions.