Ok – wow! It was a good idea to publish your story here just to remind people that life isn't easy for everyone of us and the way you interacted with her was good and very meaningful for her. At this point I'd like to join my previous speakers and beg you not to leave her alone and make the rest of her life as wonderful as possible.
Compare her perspective with yours of 60 or 70 more years. All the places you can visit, maybe a family one day and so on. All those things she doesn't even have the chance to experience. It's essential for her to have someone in her life she counts for and who is not her own family. This one can only be you. She won't ask for it but I am pretty sure she hopes to see you again. Please, do this for her.
I know it's not hard because it's harder and you might need some assistance to talk about and give you some stability you'll need yourself – maybe your parents or someone else who is competent enough to do that. Give your best, everything you have! I am sure you can do that. Otherwise, like sexxxerray said before, soon or later you will regret, that you haven't done more for her – for your entire fife. May the force be with you!
