I need to focus on myself.

That's it.

That's all it is, really.

I can almost feel myself getting lost in all this spontaneity...that is, until I remind myself that this is exactly what I've wanted all along.

And then I'm happy again

...and that's all that really matters, right?

As for you, you need to rethink all these resentful feelings you've built up.  Things change.  Feelings change.  We change.  I've changed and so have you.

And as for you, 

you're driving me insane.