Strobist in need of critique!

I have been trying to get into using off camera flash a bit, and i need some critique on what im doing wrong.

Here is one from today, ignore the location. i just need help on the light. How does it look?

I think you've pretty well diagnosed the problem already. There does appear to be another source of light coming from that general direction (photo left), but it seems to be way to the side, almost from behind.

You can raise your main light up a little bit (or bring it slightly more towards the camera), so the nose shadow doesn't interfere with the eye so much. A typical thing to do (Rembrandt lighting) is to have a little triangle of light under the eye on the shaded side.

Also, remember...bigger relative light source = softer shadows (if that is what you want). You can bounce off of a reflective surface to increase the apparent light size or shoot through a sheet or pillow case if you don't have umbrellas or whatever. As you said, a reflector (preferably with an assistant attached) would help you deal with the shadows.

I read on a book once about how "high profile shot" were taken, for example, like interviewing a famous person etc. That type of shot creates a strong image.

This shot really works for me, and the technique I mentioned was to "shoot wide and get up close". The title says it all, shoot at wide angle and fill the frame with your subject, and include the environment as a compliment.

Given the hoodie and shorts, I can see this working quite well as a strong sport shot with a basketball court background, and shooting from a slightly lower angle.

Thanks so much for the help. I think a reflector will really help. Im going to try to reshoot this shot tomorrow.
And bacchanal, i see what you are saying about the shadows, normally i use umbrellas on my flashes, but it was windy. Thanks alot!