J.R.
My suggestion is to feed her and put her in her crib and let her cry it out. I know it's hard but if she's not in pain then she's only doing it because it's getting her the results she wants. It'll never stop if you keep running every time she cries. If it's bottle time then feed her and put her back down. At 6 months she should sleep through the night without any bottles but you'll have to wean her down one at a time.
Crying has never killed a child but it is hard to listen because it's your baby. Trust me, she'll calm down and sleep and you'll wonder why you waited so long to try it :o) It'll probably take a few days though so you have to stick it out.
Best Wishes,
J.
Mom of 4