What should you do when your not invited to a party?

Yes and no; use your judgment. Going to a party alone is a good way to meet new people and help develop your social skills. However, if the person who invited you or anything at all seems suspicious, it probably isn't best to go. Always listen to your first instincts.

If you happen to end up going to a party alone though, always make sure that two reliable people know where you are and how to reach you in case of an emergency. Oh, and make you sure have reliable transportation! Don't wanna go home with a stranger now.

i think that it is probably not a good idea

you don't kno the people there and they could pressure you into doing something you might regret

having your friends with you is good because you obviously trust them, and they wouldn't want you to do anything that would hurt you or something you might regret