Nice structure and repetition of the title. I think it goes off the boil a bit at 1.05 - this tune/hook of this chorus/break/pre chorus bit is not nearly as catchy or well formed as what went before. I'd consider trying to come up with something different to go here (from 1.05 - ~ 1.24). You need a really strong melody/hook in this part.
The 'hey dont worry' that comes after is nice, the harmonies really make it stand out.
Overall I think its pretty good for that pop/singer songwriter 'teenie' genre
. With an improvement to the pre chorus it could be really great.
Production wise, I think stripped back with just guitar and vocals is a good choice. The only downside here is that it is fairly drowned in unflattering reverb - just leaving it dry would've probably been more interesting than this kind of reverb!
He sings it great though. If you can, I'd get the raw vocal tracks off him, re-record the guitar with a stereo mic setup (X-Y pair or something) with a slightly stronger/more rhythmical performance.
Mix wise I'd tone down the reverb a lot and also make the reverb a little darker (maybe just a low pass EQ on the verb). Some kind of darkish plate reverb or a smallish room (or mixture of the two).
Guitar recorded in stereo (i.e two mics panned L & R) will give a lot more width and depth to the track and make room for those vox through the centre.
Also not such a drastic HPF on the guitar, since its gotta carry the 'bass' of the track as well.
Do that and I think you've got a winner.
In my opinion....