Ruth 3

"'The LORD bless you, my daughter!' Boaz exclaimed. 'You are showing even more family loyalty now than you did before, for you have not gone after a younger man, whether rich or poor. Now don’t worry about a thing, my daughter. I will do what is necessary, for everyone in town knows you are a virtuous woman. But while it’s true that I am one of your family redeemers, there is another man who is more closely related to you than I am. Stay here tonight, and in the morning I will talk to him. If he is willing to redeem you, very well. Let him marry you. But if he is not willing, then as surely as the LORD lives, I will redeem you myself! Now lie down here until morning.'” v10-13
Ruth and Naomi have assumed that Boaz was their closest relative. Boaz, too, must have already considered marrying Ruth because his answer to her shows he had been thinking about it. He couldn't have considered marrying Namoi because she was probably too old to bear any more children. One man in the city was a nearer relative than Boaz, and this man had the first right to take Ruth as his wife. If he chose not to, then Boaz could marry Ruth.

Taken from the NLT Life Application Study Bible