You are not old enough to use this site. Talk to your parents.

You can, but cheaper to just contest it with your cc company.

Generally speaking, the written contract controls.

Poor customer service, but not grounds for a lawsuit.

It means exactly that. He has appealed the decision of the trial court.

A lawsuit will take at least a year, and cost a lot of money. If you think that is easier than going to the school, that's your call.

IMO you have no basis to sue. You don't know your GF didn't have a STD. You don't know that they said you gave her a STD. You have no damages (we...

No, you can't. There is no action based on what you wrote here IMO.

Call the police. Date someone else. ................

Yes you can. You will need to retain an attorney if you want any chance of success.