beta
I felt like sunbae's character in the present is an influence from his childhood wherein may seem to have not only people pleaser tendencies but also to make sure everything is safe like "everybody's fun and happy". It became twisted as he grows up that's why everything he built around his social life is pretty shallow. I feel like because of all these reasons, he's scared to commit. But, in every relationship, there is a risk, so he should know that even if the boat was rocked, he should not dip and leave, rather he should help the MC in paddling the boat to reach the shore.
hayssst,, he really needs to self-evaluate before having the heart to heart talk with the MC.