Dude, just keep your chin up. I know there's like "that feeling" of just glum and sadness, but you have to try and put that feeling away; play some video games, hang out with friends!
Most importantly, keep your chin up c:
And that whole "I just want someone to care for me", or something like that: People DO care for you, man! Don't ever think that nobody does because someone out there always will :D