You're not guilty of saying the truth, of opening your heart. The hurt you sense in her it's only that she cares about you and wants to help. It's very brave of you of speaking out your pain, she's there to help and that you trust her enough to disclose it's very important. Don't leave her, you may have a genuily positive bond that can help you. I for one never voiced my own issues like you to no T and Pdoc, just to my mother and she's very hurt by it so I refrain from disclosing and hide it away coping as I can.
It takes enormous courage to do what you did, you don't want to start over with somebody else, do you? The only real thing here needing to be repaired is your sweet kind heart, that even in pain is worrying about hurting somebody else's feelings. She's there to help you thru it. It's only natural we're saddened when we hear about things like this. I cried(alone) many times when friends and strangers disclose such feelings because I don't want they ever to leave, I don't want they to give up their lives. I cry because I'm human, but I don't want to ever stop helping someone. I rather cry a million tears so long I'm still by their sides to comfort them and guide them away from these feelings.
You should not feel guilty about it. You think you hurt her but you have no idea the joy she will feel when you, yourself find happiness once again. Don't force yourself, take your time to heal. The hurt you perceive now is empathy and I'm confident one day it will be shared joy. Don't give up on yourself.