1) Youtube!! you are bound to find smth that interests you.
2) Read! books, gossip sections, comics… just about anything.
3) Group chat with school friends or any other friends that will help you divert. Discuss random topics and have fun.
4) Work: immerse urself in it.
5) Music: with earphones on!!
To feel lighter:
1) Write your feeling down and shove them in a drawer.
2) Think happier thoughts.
3) Use instagram, upload some pics or quotations
But real feeling nice will happen only after solving the matter!