I am at a point now where I just do not want to be a dumping ground for his misery. He has been married now for about six weeks, and he is starting in again about *stuff*. I told him last time he spoke to me that he needs to find professional help to bring his problems to...don't know if he will, but...
Perhaps if you guys do stay friends just ask to change the subject whenever his romantic relationship comes up.
God bless.