{{Teppy}} What a bunch of people already said. It is natural to feel unsettled over the ex-gf visit. But The Boy damn lucky to have The Tepp.
And to make this about me, DH used to have huge insecurity issues about DH#1 and DH#2. Which I did understand, but I tried hard to explain why he shouldn't. DH#1 I divorced, as in, didn't want to be married to him anymore. DH#2 dead, as in, of course he was all perfect and stuff. Over time he figured out that I was with him because he was the bestest DH that ever was.
So survive~the~visit~ma headed your way because really I would feel the same way. And because it can't be said often enough, Teppy smart, and funny, and sexy, and the highest quality GF evah.