I Loved Someone That Didn't Love Me

I fell in love with the most beautiful girl I ever met, her smile could brighten my entire day. She was one of the smartest people I ever met, and she is one of the most compassionate and caring people I ever met. For years I believed I wouldn't find anyone who could like me, I kept an emotional barrier between me and every girl I liked until I met her. Before I met her I never went out of my way to help someone since the last time I broke my heart. She taught me I could care about other people without being taken advantage of. But now she picked someone else and we rarely talk anymore. She's always said I'm one of the nicest, considerate, and compassionate guys she's ever met. She's always said we were friends, now I don't know if I should change back to the person I was before I met her. I know how unattractive I am, how I have nothing to compete with other guys, how worthless I feel compared to other guys. Is there any hope for me to ever find someone?