What are we?

Are we together,
or not,
are we friends,
because I surely love you a lot!

We may become something,
you know,
more than friends,
only time will show.

I'll stand by your side until forever,
no matter what we are,
and we'll ride to the prom,
in that special car.

You will probably be my first kiss,
and first love,
first everything,
my first beautiful dove.

What are we?
I'll tell you,
we are best friends,
not three musketeers but two.