i like skinny guys, but your face has a nice look about it, you have lovely skin and good bone structure, I reckon if you lost a bit of weight you'd have the potential to be pretty damn good looking! and you're reasonably tall aswell, which is always a good thing. good luck! :)
You've got the potential to be a 7, but as of now I'd say you're a 4-5. Don't put too much stake in my opinion though, I tend to go for regular or underweight guys, and there are definitely girls out there who find your end of the spectrum more attractive.
I think you're cute, but I'm one of those girls who has a thing for larger men anyway. if you don't feel good about yourself, you need to focus on that and make changes. Diet and exercise. It sucks, but its the only way. I'd give you a 6 1/2.