This has been one of the most interesting threads i have read in a long time, Its really nice to see some actual conversations. If everyone looking for someone would read this thread then I think that our community could be a much better place.
As for my experince, I havent had much but I was in a commited relationship for about a year before i told my partner about my fetish. When I told her she didn't freak out, i just explained it as best i could. She was accepting of it and occasionally we would incorporate diapers into our lives. Im only DL though so ive never wanted a "mommy" per se, nor have I wanted to wear 24/7. The best advice, as mentioned before, is to start a healthy relationship and then whenever you feel like the time is right, tell your partner about what you want. Chances are they will be accepting and even willing to somehow participate.