I'm 18 years old and I want to drop out of school?

Your question is hard to understand. Stay in school.

She is a minor, and you are adult. So while dating is not illegal, there are several other areas that could be problematic.

I have no idea of whether Mexico has a cause of action that would enable you to sue, but it would be in Mexico, not U.S. The resort has no liability.

Do i need to get it notarized ?

We have no idea what document you are referring to, but the point of notarization is that the notary sees the person sign.

I can only guess that the cost of suing them would be much more than the amount in dispute.

To what end? The likelihood that they have any money to sue for appears to be near zero. If you get a judgment they will file bankruptcy, and...

You cannot sue someone for lying....

You have done exactly what you are supposed to.

Not really. You can apply to get a corrected one.

As with any Bar Exam style question there are numerous possibilities, depending on facts we don't have. Bottom line: It is going to be up to a...