I think im bi or what?

Ok so im 14 and yesterday i was filming my project with all my friends and after school i had to film a love scene not graphic but still... Anyways my friend dustin couldn't come to film it so i had to get 2 of my friends ( girls ) to do the scene after a while one of my friends Katherine said this is so wrong people already think im then i said but ur not and there just kidding. Then her and Marie were like katherine is bi. That's when i thought they were kidding but what slipped out was EWE i didn't mean it i made her cry a little bit. I said i was so sorry and then we talked about it and she told me about her girlfriend suzi and how her mom is making her go to therapy. It turned out she wasn't kidding cause one other person other than me and and Marie knew and that was Jami. Katherine is really pretty and before yesterday i never even thought about her being attractive. But now i do i had a nightmare or maybe a good dream about making out with her. I feel good and bad about it i want to be straight i know there is nothing wrong with it but im still uncomfortable with it. I guess it would be sorta ok but at the same time im ok with it but not ? I cant tell anyone because i have a lot of friends and im popular to almost everyone i have so many problems right now anyways but if for some reason Katherine's lying i just dnt know. And i cant tell if im bi or if im just going through phase i mean i had one other dream with a girl but i got over it it wasn't like this one. And to top it off im sorta going out with some one ( guy ). Im so confused i dnt want a serious relationship with her or a girl at all just enjoy making out i guess i dnt have a problem with that but telling everyone or being bi and judged oh i so cant tell my parents i dnt ever talk to them any ways. HELP ME!