I think I can hear the song you have in here. I can tell where you want it to go. I'd strongly recommend you develop it a little further, or a lot further, before you let it out into public again! As a before picture, it's pretty good, and I'd like to hear the "after" picture as well!
I like the bones of your arrangement, seems like it's pretty solid. I'd be tempted to double those vocals for a little depth. Sadly, I couldn't pick Bruno Mars out of a line up, and he's probably the most successful songwriter in the last few years, I know, I know. That might be less of a compliment for his songwriting, and more a comment on the years.
good job, good night, and good luck!
-Tom