You have wonderful voice. I like the songwriting too. I felt like you really connect with what you are singing and I can feel the emotion in your voice. The whole tune is pretty simplistic, but I feel that's fitting with this kind of song.
I'd suggest smoothing out the guitar playing, and maybe overlaying some more guitar or even some vocal harmonies (think Elliott Smith like). It might be interesting to hear some sort of B section, with some different chords, then tie it back in with the A section. Although, I think the desperation and repetition of what you have now works well. It really drives the emotion home.
Good work :)