Friends bs

Sigh, just need to have a slightly drunken rant.

Basically I've got one set of friends who will always invite me to whatever they're doing, going clubbing or just for a pint.

Anyway, I've got another set of friends which I tend to hang around with at school more because I'm in more lessons with them. Anyway, they basically rarely invite me to stuff and it really takes the piss. Like they'll go out, without telling me, then they'll tell me all the great stories and times they have the next day to my face.

In this group I don't really get along with a couple of people and they tend to organise everything, which is possibly a reason for why they don't bother inviting me.

What should I do? Should I just write them lot off and forget about them (though at school we have loads of good times together and the rare times I have been invited out with them it's been a lot of fun) or what? Can't wait to go to university and get rid of all this high school bull**** and make a clean start.