Wtf am i suppose to do?

i just cant find a gf no matter what i do. recently i met dis girl at school n talked to her for a week. i asked for her number. she gave it to me and we texted over the weekend. i was suppose to meet her in the cafiteria dis morning. she said she was looking forward to seeing me but she never showed up n den texed me w/ her friends fone later dat day n basicaly said shes not interested. now my self esteem is below negative n im really upset. why did she do this to me