Adolescence is a time of heart-breaking anxiety. Kids want to be accepted and respected. They want to be individuals, but have not yet acquired the life experience to be comfortable with their individuality. The 'cool' ones are just as terrified and self-conscious as all the other kids - but they are just better at swaggering about and pretending not to be afraid.
All the advice above about finding something you love to do and then learning to do it well is excellent. Also, the advice about conducting yourself in a manner that shows you have self respect. So, if guitar appeals to you then focus your intellect upon learning as much as you can about music in general and guitar in particular.
Non-musicians and non-artists find it very easy to deride people who chose to pursue the expressive arts (music, theater, art, poetry, literature, etc.). However, you will eventually find other persons who share a passion for creating. Creative people are few and far between, so don't expect everyone to understand your passion - just do what you do well, and you will find kindred spirits. James
"That darn Pythagorean Comma thing keeps messing me up!"
[url]http://en.wikipedia.org/wiki/Pythagorean_comma[/url]