Hey there,

I made this song for my girlfriend and she really loves it.
It's the first song I have ever came up with and I'm not very experienced with all those scales and chords.

But just check it out:

(right click, save as)

Not bad actually, obviously the drums aren't great but the guitar playing is tidy and there's enough variation to keep things interesting. I can't say it made me go 'wow' at any point, but then I'm not exactly the target audience, am I?

In fact I don't think any kind of detailed review is necessary in this case - if your girlfriend liked it, isn't that all the crit you need?