Passing it on

I'm so torn and confused. My daughter has been having issues falling asleep at night. She'll only fall asleep with me in the room, rubbing her back. If I leave before she's asleep, she begins crying herself into hysterics, calling me "mama. mama." I don't know what to do. I want to go in and comfort her, but she needs to learn to find her independence. She needs to learn to fall asleep on her own now, while she's still young. It'll only get harder if I wait til she's older. But every decision I make, I question. Will she have BPD, because of me? Will she have to deal with the same bullshit I do, because I comfort her too much, or not enough. I don't know what to do.