Fun Slumber party/Sleepover Ideas?

I haven't seen my very best friend in over a year, and she's finally gunna come over and spend the night. We both messed up in the head, like cukoo bananas, so we don't really have any other friends. ANYWAYS. We're both 15, and we're not into that whole girly sleepover thing, we're- mature, for lack of better word. I've already got that timeless stuff, down, like mask with eye cucumbers, truth or dare, and junk food and stuff, BUT I NEED TO MAKE THIS FUN. Please? c: