Absolutely, it is normal to feel sorrow for a living person. I feel that way all the time for my sister and brother.

My sister and I were best friends growing up (we were inseparable). When she was 17 and I was 19, we went our separate ways (she chose the path of drugs and alcohol and I didn't want to go down it with her). I am now 33 and she is 31, she is unrecognizable. I miss not having her as my sister, all of the what could have beens. Raising our children together, she should have been my maid of honor, she would have been my childrens godmother all that stuff I wish she was around for. She is in rehab now and will be going into a recovery house soon (she has gone through this cycle many, many times (I hope she makes it this time)). She visited us today, it is sad to see her. She has aged worse then myself (because of the drugs). There is no nice way of putting it, but she is fried. I still love her but she will never, ever be the same. I miss her, the sister she use to be. She was supposed to be my best friend forever.

I think it's perfectly normal to morn for a person that is still alive. I do.

You made the right choice by separating yourself. It's for your own survival, you are wise and strong to do so.

I'm sorry for your loss, I can feel your pain.