Not necessarily. You could be giving out some body language that turns girls off. Smiles are always helpful and a relaxed posture, not worried. Don't look around a lot because that makes you seem desperate. You should try talking to girls also instead of just focusing on how they look. Get to know them better. Hope that helped!
I look away when any guy looks at me, whether he's attractive or not. It's just sort of a reflex for me so, I dunno, maybe the girls you've looked at are doing the same thing I would do. It doesn't mean you're not attractive so don't worry ;)
Bro I fell your pain, I once was in your boat. Pretty much all my high school years, its all about vanity with women. And I've been on both sides of the spectrum, had a spinal cord injury in my early 20's from a millitary deployment. Ask me how many women gave me the light of day as a cripple, very few I can count it in one hand from 2 1/2 years with a cane. Now that I just recovered the attention is ridicoulous, more than college because I'm "toned". But having been on the other side I learned to appreciate personallity over looks. Most are self consious hence subsconsiouly theyll expect someone who is the opposite of them, as is the innate character of women to seek a masculine man for protection and security. Logic has an influence but hormones and pheremones drive the primitiave behaviours of womens limbic system and amygdala, primitive brain centers which are unaffected by higher cognitive reasoning. Mens neurochemistry is similar but different hormoes react with different portions of the brain. In a nutsell, become the man you want to be embrace it to the fullest. Because if your not happy its time for change, good luck bro