I (14M) lied to my girlfriend (13F) about my sexuality, and I feel like I can't tell her the truth.

I (14M) lied to my girlfriend (13F) about my sexuality, and I feel like I can't tell her the truth. I thought that I genuinely did love her at the time, as I felt the most attraction to her than any other woman, and she is really sweet. I don't know how to tell her that I am gay, or that I was just excited about being in a relationship when I told her that I loved her.

    I feel like a complete and total asshole about this. I need help. I don't know how to bring up the situation, because I only see her at school, and I don't want to be even more of a dick by just sending a text, but I've been thinking of just doing that.