Birthday partyyyy helppppp?!?

Okay, So I wanted to have a nice party for my 13th birthday, instead of my 16th, I already know where Im going to have it , at my church. I can rent out this huge gym place. I need some ideas!! For the theme, Party favors, games, invites~~ I was thinking about having it be like a sweet 13, with a lot of candy and personalized hershey bars as the invitations.. So what do you think? Any other ideas? P.S I want a lot of people to come, but do you think I should invite people who aren't really my friends but I know them and they are nice????? Please don't be mean on here!!!!!! P.S.S I want this to be a huge party with a lot of people! Not like 100's. but like 40-50! THANKS!!!!!!!! ;] Oh and I almost forgot, the party will be in June..