weak mommy ..NO be strong!

This is what keeps going thruogh my head as i listen to my daughter (ONE YEAR IN FEB!) cry herself to sleep in her crib. All alone. Well, she has her bear bear and her blankies ...but without mommy. I feel so horrible doing this to her but I have tried every single thing else and nothing works. I cant rock her, she abuses me, I cant sleep with her, she things climbing on me in a game, I cant sit in her room with her, i tried and she stayed up for almost 2 1/2 hours! So this is it. Im broken. My peacefull parenting can only go so far i guess :( HELP!