Break-ups are (generally) difficult for all involved - I don't think many are simple, so please don't beat yourself up about it when you are doing this for the right reasons. You both deserve a clean break and to be happy - from what you've said, it doesn't sound healthy, so I think well done for recognising the need to move on.
It shows that you are a considerate person because you want to make sure your partner/ex is OK. I'm not sure what sort of support systems there are in place where you live, but perhaps you can point her to some organisations that might be able to help her? I don't think you should be solely responsible for her if you need time and space to focus on self-care.
Personally, I need space after a break-up, as it gives perspective to reflect on everything and focus on your own needs/healing. I have been friends with exes but eventually we have grown apart and moved on with our lives (not in a nasty way).
Take care of yourself and good luck x