This is great song for showcasing the vocals, it's got great presence, lots of emotion, super control, and a special vibe. Loved the little chuckle, it made me smile.
If you wanted to pursue this further, you could do worse than work on what you are doing. It seems to me you already have something special and could work this up into something great.
You could also do worse than share your creations on this site, as there are a lot of very talented people here that could guide you on your journey if you needed help with something.
Good luck.
P.S. I tend to agree with Wookiee, the guitar would have been sweeter without the phasing effect, but that's just a personal preference, you play it how you feel it.