(((((((((((((((((( Angel ))))))))))))))))))))
That's a tough spot to be in.
I think with T, I finally kind of FORCED myself to let him in a little. It was really, really scary, and hard, and I spent every minute between that appointment and the next one pretty much in a total panic. But when nothing bad happened, and it turned out it was safe, I realized that letting him in that little bit was okay. Then later, I let him in a little more - same result - same panic, etc. But then it ended up being safe again. It gets a little easier all the time, although I still have to fight that urge to run.
I guess for me it took a leap of faith. Scary, scary stuff.
I wish I could be more helpful!