Issues regarding impending marriage..doubts...and backstabbing friends.Please help:(?

You seem to already know what to do. Talk to him. If you're about to marry this guy, you need to know for sure that you could confide in him, split property and money with him, so what's this one talk of a rumor? And, if it happens to be true, then you're stuck with your choice. And if he says it's not true, but it's a lie, then ask your guy friends. Honestly, the best people to go to when you have guy problems are guys themselves, especially ones that know your man and how he is, but love and trust you more.