Argument with my best friends?

me and my friends had a horrible argument today. basically we all got a bit overexcited and i spilt my friends drink all over us both. my three best friends are really mad at me. what makes it worse is that its a few days until my birthday, so im afraid they'll all still hate me then. i've apologized to them loads, and told them i'll change and that i'll give her the money for a new drink. But they aren't taking it in. also, one of my friends who is the more stubborn one in the group, has been putting on facebook that there's going to be a massive argument at break in the canteen and that people should come and watch. i've been crying since i got home from school and i just want things to be better again.