No one in your life is with you constantly, no one is completely on your side

Nothing is so good it lasts eternally
Perfect situations must go wrong
But this has never yet prevented me
Wanting far too much for far too long.

Ever had that feeling that something's going to go wrong? It usually happens when you feel like everything else is going okay. Everything's cool and dandy and going fine. Then BAM- bad times.

At the minute, I guess I can't complain. I'm freaking out about the future a lot, and I'm very sleepy; but when I think about it, things are going okay. School's alright, things are going well with my friends, and I'm happy enough. But I have this awful feeling in my gut that something's going to take a turn for the worse.

"For every good thing that happens, there will be a bad one."
Surely that can't be true? Why do we have to live a content plane? As soon as we seem to go up, we have to dip back down again- it all balances out. I don't like that. There seems to be a whole lot I don't like, doesn't there? I know that there are ups and downs in life, and shit happens- but good things happen too. Why can't we just have a run of nice things without having to expect something bad to happen? Lots of rhetorical questions here, but I am genuinely trying to work out an answer for at least one of them.

Is having a good time for a long time too much to expect? Is it greedy? And is it bad to consider my "bad" things "bad" when there's so much else going on in the world? I mean, Japan's in turmoil, and I'm watching Comic Relief right now, and I'm worrying about a possible argument and gcses? Priorities need a bit of shaking up methinks.