zivugzone.com or frumster.com
but make sure he is not taking you or your children down the refom conservative path.
Also you may be interested to know the Lubavitcher Rebbe never said he was moshiach, nor did he allow anyone to say that about him. He was a tzaddik, but he was modest and knew the Halacha (jewish Law) principles involved. What happens in the future is still Hashems will.