I seriously need some pep talk on something?

so theres this guy i REALLY like, sometimes i feel like im in love with him. he has a girlfriend and now my heart is broken. im depressed about it. his girlfriend is ugly so it makes me feel horrible and really ugly and hes such a great guy, hes so cute. i have cried over him a few times and the worst part is, he knew i like him. i dont know what to do.