MC is aware he should have gave the legendary to him. Yet has the nerve to ask, are you sure you don't want it? What sort of shitty friend is he. Obviously only a completely shameless 'friend' would honestly say "Yeah, I want it. However you didn't give it to me. I'm not going to beg you for it."
A real friend would decline because of it's value, even if offered it. However if the MC told him about getting the 4 legendary rings? He shouldn't even have to ask. You got those 5 legendaries (pants+rings) through the legendary map your friend shared with you. It's not his fault he had to leave for guild business. Point is, you wouldn't have gotten any of those 5 items without his crucial help. Reasonable friend would not even give the choice of 'Do you want this'. He'd have already given it over because they're friends.
Again. Confirmed MC is a greedy garbage friend.