How can i take this girl away from my mind

Okay she is Beautyfull,Intelligent,Loving and Caring.I know she will love me the most if i show her caring.She is so much commited in this.But i know that inside deep in my mind i am not the person for her She deserve someone much more intelligent,than me...
She is showing interest in me,because i think we both have many thinhs in common like we both look the same,have same walking styles and all.but inside me i am not productive as her.that is making me depressed each day,everyday...
She has a very high network of boyfriends and she enjoy her life in her own way but at the same time she is keepong her interest in me.

I dont know what to do..i cry most of the day.I like her so much with my heart.i care her so much inside.but my reality is telling this was not for me..so conflicting..