Especially when things are more complicated when you thought they'd be, and you want to give up. And you hurt someone just by finding a bit of happiness. And even when you dress up in your ballgown and panda hat you still feel sad.
Sometimes it's really, really hard to remember the good things you've got. But it's really important that you do.
Have a little talk with the one who always seems to say the right words, and if you don't have one of those, I'm generally always around to give it a bash.