Well put Ellie
I too am sorry for your loss and I agree that this is grief. Take your time and allow yourself to feel sad about it. I hope the feelings pass. I cant imagine how hard it would be to run into T on the street. I see my P on the street but we just ignore each other which is what I requested from her. Maybe you could try thought stopping when you see her and replace the thoughts about her with something better. Like have a thought ready for when you run into her so that you dont have to suffer those feelings.
hope this helps
Cyn