greif sucks! Clinically speaking, it takes about 7 years to go through the stages of grief over the loss of a spouse or child. I imagine a twin would be about the same. It's not allways like your in a terrible depression, but it's definately something that stays with you for the better part of each and every day......and that's after almost 3 years for me.
I dont know how much good therapy could do......I dont want to pay somebody to tell me how to feel about it. Nor do I want to pay somebody to listen to me talk about it and not have any way to fix it. In the end, it's very personal to every person I think, and for me, I really just prefer to be left alone about it. Oddly enough, it's never hard for me to bring it up on these boards, but in real life, it's something I NEVER talk about. Go figure! I just hate that look people get, or the stupid questions they ask, or being treated differently......like I'm a 5 year old or made of china or something. Anywho, It's just going to take a long long time, and I dont know that she will ever be back to "normal". Life's events have a way of changing us permanently. She will laugh again, and certainly she will get to a point where life is a little more joyful, it's just going to take some time.