Bi or just friendly?

Im 18 and have a serious boyfriend who I've been with for over a year now who constantly cracks jokes about me being bi because I've hooked up with my best friend before for a scavenger hunt when I was drunk. I'd also had 2 other drunken hookups with two of my other girlfriends and last week at a party with that same girl I got really drunk and kissed her again. Twice. She wasn't even into it and now we all joke about the subject. Idk what possessed me to kiss her if it wasn't to turn on a boy? The only time I'd ever been interested in porn was just watching girl on girl with my boyfriend. Just 2 girls making out PG stuff nothing more. I've never been interested in going any further with a girl, my own vagina kinda freaks me out tbh, I just like kissing. Lately I've been wondering does any of this mean anything about my sexuality? Or am I just hella friendly with my female friends?