Thank you for your recent post and for your expression of gratitude for the help and support you have received. It is really nice to hear from parents who feel that they have had positive support.
As Boobop16 has posted, what happened it not your fault. As long as you are there for your daughter as you have always been not having her father in her life might not be difficult as you imagine. I understand that as a mother, you want the best for your child but I am sure you are doing the best you can in the circumstances.
I suggest that you use this time to adjust and do something for you whether it is starting a new hobby or just taking time to do some reading or gardening or anything you like, for some me time, will be good for you in moving forward.
I do wish you the very best of luck and hope that all will go well for you and your daughter in the future.