Hey Sotto, thanks so much for your comments. I need to keep saying it to myself over and over again that he is just a colleague that I haven't seen for a while.
I like your suggested responses especially the response to him telling me he is seeing someone else. I think it will be better than just walking away.
This has really helped, thanks so much! X
Me - 47 H - 45 D-16 M - 6 years Separated - May 16
Don't leave me behind can't you see me I'm shining... (Years & Years - 'Shine')