I need help

I bi. At least I think I am. Every time a see a couple together I always get all mushy and my heart races because I wish I could have that and that’s not just because I see a boy and a girl together. It’s because I see a girl and a girl together. There is no one at our school that is openly bi or lesbian that is not all ready taken or out of the closet. There was this one girl that I still kind of like though now that I think about it. When I was just starting to come out to my friend she came out to me. She basically played with my emotions and literally told me to my face when I would be asking her out so when I did she said that she wasn’t in the mental state to another human and I felt extremely embarrassed and then closeted my self again I am going to a different school next year and there is a lot of lgbtq+ humans there so I’m excited about that but I can’t wait for 2 mouths so does anyone have any suggestions on how I should go forth with anything?