If i remember correctly, you need to rise affection with character; talk to them, take them in party, give them gifts, rise affection in city hall for completed quests. Then start dating, say you love them, something like that and finally you need to build church and have a ring in possesion then you can ask them to marry you.How to marriage in this game please explain me i want to know how to marriage in this game
Btw there should be little guide in the folder with game, i played this game sometime ago so im not sure.