I think if you look back at this thread at some point, you'll see that everyone gave you some pretty wise advice, but right now it may be too early for you.
But I'll go ahead and second everything that's been written to you. You said it yourself, this woman made you feel special, and that's the problem. You don't need the validation of someone else to feel special. If even one-quarter of the neediness and co-dependency that we see in your posts came through to your gf....it would be a turnoff.
I'd also like to say that it feels, from reading your posts, as though it isn't necessarily this woman that you need so much as it's someone. The things you want; someone to talk to and share your experiences with; someone to take care of, are what many people want, and since this is so sudden and so traumatic, you equate wanting these things with wanting this particular woman. I think it's fair to say that at the end of the day it's important to have a like-minded person share your life and experiences, but that person will come along. It doesn't necessarily have to be her.
Maybe things are still too raw for you to appreciate what others are saying. It's understandable. But this is the surviving forum, and we are a much more...is it realistic?..crowd
You cannot be lonely if you like the person you're alone with. Dr. Wayne Dyer