I try not to go "batty", I do little things around the house when I get flustered.
Last night I went shopping at Walmart with a friend just to get more walking in...and ran smack dab into the ex. Haven't been face to face with eye contact with him in ages. He said hello, I said hi and rolled my eyes, turned away. He got yelled at by the new woman for even saying hello. Then she left the line we were in...talk about being junior highish!
It was all good though, I got to face him and realize that I am doing very well. Unnerving? Yes. End of the world? No.
Besides...he gained all the weight I lost...hahahaha!