When did this happen?

When did this happen?
i just dont understand
one minute we are friends
and the next i want you as my man

this really shouldnt happen
it just isn't right
because now all i want
is to have you by me tonight

maybe its just a crush?
so why does my heart skip a beat
and when your with her
my heart falls to my feet

i smile and hide the fact
i am crazy for you
your all i want darling
and loving you is what ill do