Thanks Bill, very good question...

I considered ourselves quite tight and close. I live 2 1/2hrs away but we regularly keep in touch and, as I often find myself in his community, we see and spend time with one another at least once monthly. I just had lunch with him only days before my father inadvertently told me (maybe accidentally on purpose to ease the burden of keeping a secret). Why would he have not let me know at that time?

The others are perfectly correct that I let him know I am aware of this and ask him what is up with keeping me out of the loop. I ought to tell him I feel he is intentionally being secretive when it comes to me and that my feelings are hurt. This is so much easier to talk about than do.

Thanks to all for your support and thank you Bill for your query.