Proposal songs

I just read and watched the video of a guy proposing to his girlfriend with the song 'Marry You' by Bruno Mars.

It was touching, teary and all. Lovely.

But why that particular song?

'Cause it's a beautiful night
We're looking for something dumb to do
Hey baby
I think I wanna marry you
.
.
.
If we wake up and you
wanna break up, that's cool
No, I won't blame you
It was fun, girl

That's not very positive..

But if you're open and all, no harm la. It's a nice chirpy song. Gets you in the mood.