How can i boost my confidence?

[A]

i have a very low confidence when it comes to my looks. i'm a little overweight and pretty pale and definitely not the prettiest girl in the high school. for some reason i take comfort in baggy sweatshirts, i never really understood why but i figured it had to do with my confidence level. anyways there's this boy i really like and some days i wonder if he likes me too. we've never talked but for some reason i get this feeling that he might like me too. he stares at me sometimes and it feels amazing. but as soon as i start thinking like this i immediately think that obviously he doesn't like me because he is so perfect and i don't seem like the pretty girl that he would go for. i feel almost as though it's just me imagining things because i want to be with him so badly but i can't understand why he would want me in the first place. how can i feel better about myself??