Very nice sweet song
I really liked your vocals on this one. Very nice harmonies and I really like the tone of your lead vocals!
About the mix, I unfortunately found it a little bit messy. The acoustic guitar being the main issue for me, how did you record it? It sounds a little bit like it's recorded with a jack plugged into the acoustic guitar. I would pan it more to the right and turn down the volume so it doesn't stick out so much. I guess this is just my taste, but I would maybe re-record and go for a more conventional acoustic guitar sound - more fluffy-like, I think it would accompany the nice piano sound/playing and the natural drum-sound very well.
I'm maybe boring, but I would try a more typical mix, with the drums(snare) in the middle, and vocals, and pan other instruments further out to their own panning-place so each would get more space so it'd become clearer. And, turn up the volume of the snare!
Also, I'm not completely sure, but some instruments sound like they have a weird kind of reverb and are sticking out, not sure. Did you use a stereo reverb on them - it doesn't like it on some instruments? Also, I would maybe try to use a bit more compressor on the lead vocals, for more level consistency - maybe. Not sure! And definitely turn up the volume of the background vocals, those are sweet and deserve more attention
These are just my opinions, so I hope I don't sound cruel, or like I know better or anything!
Anyway, a very nice song indeed!