How do I know I'm really biual or if it's just a phase again? 10 POINTS!!?

Up until grade 7, I thought boys had cooties. I finally got my first crush. Age 12. I had the same crush in grade 8. Age 13. In grade 9, I found out what the word "" meant. I have really bad anxiety and OCD, and I convinced myself that I was one. I was 14 then. That lasted for about a month. It went away. I am now 15 and have an amazing boyfriend. He really turns me on. I know I want to be with him. Two nights ago, this thought just randomly popped into my head when I saw a picture of a girl. It was just her legs. I am VERY VERY self-conscious of my legs, and in school, I get jealous and envious of other girls' legs and body types. When I think about doing ual stuff with those girls, there's no emotion in my body. No interest. When I think of some girls naked, I get a little creeped out. I don't feel like experimenting. When it comes to my boyfriend, it's all the interest in the world. I'm trying to tell myself that I'm just jealous, and it's a stupid phase again. My hormones are out of whack. Is this right? Could I be bi-curious or am I just jealous? Is it a phase again?