Well I have half the mental stability at least

Oh really, what a coincidence. I only have one too. Same pinch.

Which do you have?

I am so sorry, I totally forgot about this.
About the question, it's Girlfriend. I have only have a girlfriend.

No worries mate, and good for you
I have (relative) mental stability

Damn same here and I'm already a tad older than you

That's OK, you've still got your whole life ahead of you!