what should i do?!! i'm so mad at myself....

my brother has this friend...a hott friend lol...and we always mess around with eachother but the last time he came over he was such an a--....so i said to myself "the next time he comes over i'm just going to ignore him the whole time".....well, he came over last night, and it worked for the first couple of hours but then they all came in my room while i was listening to music and wouldn't leave me alone.....and i kept trying to drag all of them out....but it didn't work, they just keep on coming back in and he started messing around with me again.....and when i tried to get him out like the 5th time he just picked me up and took me to the other room......and then we got back in my room and they still wouldn't leave so finally i got them out and locked my door, but i locked myself out too lol....and i hung out with them for awhile, and now i like him again.....god, i'm so stupid....and i'm so mad at myself, what should i do?!? PLEASE HELP

thanks....i'll try