help?

okay so hi. i have been talking to this guy for about a week, (we’ve talked before) and i really like him. there was a party today and we were both invited. but his bestfriend (that’s a girl) was all over him and he didn’t seem to mind. and he gave her more attention then he was giving me. am i taking this out of proportion??? i had an anxiety attack so i had to leave and they were just all over each other. like i really like this dude and i don’t wanna loose him. and the thing is, i just got back being friends with this girl. and she knows we’re talking, but she still was all over him. everyone there knew it too. please help me. idk if i’m freaking out over nothing