Any good tips/ways to distract yourself/not think about someone?

I happen to be in the (possible common) case of having my “heart broken”. Not as traumatic as it seems, I simply just need to keep someone off my thoughts right now.

The story in short summary: I have a really good friend, whom I ended up kissing with. That really wasn’t a good idea, seeing as I ended up wanting something and she didn’t.
Now, I try to be a nice guy, and I want this all to progress as smoothly as possible. I really really love her as a friend, and we’ve been getting along so well before all this. Me wanting something more, shouldn’t come and ruin something like this (again).
So, with getting more into details that would just bore you all; the only way for this to work is to be friends. I just happen to be liking her more and more. And if it wasn’t bad enough already, she kissed with two other guys last saturday (one of whom she’s become really friendly with).
Yes, I’m the jealous type, not proud if it, but that’s where it’s at.
So, please fellow jellies, if anyone has ANY good tips or ideas to distract yourself/not think about someone, I would be extremely happy! :)
Thanks!