I confessed my feelings to someone in a relationship

(This does include underage drinking)

I (15f) confessed my feelings to my friend (16f) while drunk. I feel horrible and it has sent me into a depressive episode. I'm typing this while hungover. As most teenagers do, we partied on Halloween night. We bought a 1L of cheap vodka and ran around my neighborhood trick or treating. At some point in the night I was so drunk I couldn't walk straight and kept flirting with my friend. I said I liked her a lot and asked her to kiss. She said she has a girlfriend and I said well I already kissed your gf tonight. She seemed shocked but I don't remember much. I kept saying I could treat her better and I wouldn't cheat on her like her girlfriend does. She said she'd be with me after they break up. I blacked in and out after that. There's more to the story but I feel horrible and disgusting. Like a predatory Lesbian, preying on someone like a male would to a female. I feel deeply ashamed and I'm scared my whole friend group hates me. Also after we all parted our ways (11 of us) the 4 of us went to my house and I blacked out. I remember crying to my best friend about how I'm suicidal and I couldn't stop crying. This whole thing caused such an uproar on my personal relationships and I can't help but feel sad. I wish I could tell them I'm sorry and it would all be better but I know that's not how real life works. I just can't stop feeling disgusted in myself and ashamed of my actions. It's making me feel more suicidal and anxious. Thank you for reading and please give advice if you can. I know I'm in the wrong and let me know how I can fix this.