I have a gay friend who is in a similar situation (being a dumpee), and we once compared notes of the most-common phrases we hear:
"My wife and I have just grown apart. We're like roommates."
"I'm bored with everything."
"I love my kids, but if I had to do it all over again..."
"Marriage ended my sex life."
"If anyone younger than me asks, I tell them not to get married."
"I wish my wife rode a bike... like you do." (My gay friend doesn't get that one)
"I'm so angry, and I have no idea why because I have nothing to be angry about."
"I need a change, but I don't know what I want."
The sad thing is, my friend waited for 20 years to get married to his BF because he wanted it so badly... and now that may be taken away from him.