14th Birthday Party Ideas?

I'm turning 14 next Friday. I really wanna have a fun party. Like really fun! With lots of friends, guys and girls, but the guys have to leave. I have no clue what to do. Plus we have to go "cheap" this year cause for the past three parties my mom has spent about 3,000 dollars /:

Any good ideas? Please help me? Think cheap, but fun! I also like the color purple. I like to play soccer. I like to swim.

By Makayla C.