I must be the least qualified person to offer marital advice as I was legally able to marry in 1979, avoided it then and have done so ever since, although I've been a best man once and seemed to get through without making too much of a hash of it.
So I guess I must be one of those who hasn't made the same mistake once.
As others have said, have a terrific day Dave, and the soon to be Mrs T, as I'm sure you will and enjoy the rest of your lives together.
That goes for all other future marrying types on here too.
The very best wishes and congratulations!