How do I get back to my fun, happy self again?

I always see the worst end of things. My boyfriend and I aren't talking, and I swear he's leaving me. I keep failing my road test, and I see my future crumble. I have no desire for friends. I pushed my best friend away after Christmas, and I have no desire to fix it or make new friends. My aunt died, and I cry all the time, even if I burn my lunch.