Yes, I have lived there for about 5 years in total, and been visiting regularly for over 20 years.
If you google UKBA and do a search on there, it will tell you what the current requirements for fiancee visa are.
If you have dependants under 18 who you wish to bring here in the future, then their father will need to give his permission, and if you have a previous marriage, this will have to be annulled.