Insecurity? help.....?

The truth is..im so insecure about myself and I admit that. I went and toured the school I will be attending next year the other day, and it really upset me. There are so many girls, look like models, stick thin, good at sports, have guys fawning over them.. and I don't know how to compete with that. i looked in the mirror and saw that I'm starting to get cellulite. I'm 5'2and a half, 110 lbs. I just really want people to like me and I'm now scared for next year and am beggining to dread it