It crushes when you find out the centre of the universe that you thought you wear to someone, is just a planet in orbit of some thing else. When you're told you were all that they needed, all that you were was their number one priority, but you're not. For all you know, you could be 50th but they'd still be telling you you're number one. When they used to jump at every chance to even SEE you from a distance and now they think they'll be bored.

When they can be pissed at you as you tell them you love them, but they can't say it back.

That's when you consider your purpose and that's when you want to die...

Your one priority and you're only an option to them.