I Don't Know If I'm A Lesbian

But I do know I'm in love with my girlfriend. I've known her since middle school but she's a grade above me so I hadn't had the chance to talk to her until this year when we both took the same elective. There was an immediate spark and we hit it off right away. Turns out we have almost everything in common! One day I realized I had feelings for her. A month and a half later she left school at the end of the day for Christmas break with a letter I wrote. She didn't know it was actually a love letter. But she read it, and later that night she confessed she had feelings for me too. A week later we decided to start going out. Three months after I developed a crush on her, I'm now confident this is love. She's everything I want in a person, boy or girl. And this time I actually enjoy kissing her, unlike how I felt when I kissed my ex-boyfriend. I'm not sure if this is because I'm a lesbian or if I just connect with her better. I know I liked my boyfriend, but I couldn't see myself with him in the future (we only lasted two months before he broke up with me). However, both me and my girlfriend agreed that we could see ourselves together for a long time. She's off to college in the fall, and she assured me she's in no way interested in ending our relationship at that time, which really shocked me. She's serious about me, and it makes me love her even more. She's perfect.