Bangchan has a weird definition of being someones friend, for him it means be supportive; present; nice; caring and talkative... As a best friend he's all that plus way too loyal and careful. You've noticed due to his friendship with Meave.

It seemed like a normal friendship at first, but lately things got out of hand; he's been ditching you for her.

"Sorry... I know we have plans" he texts "but Meave asked me help her moving out.. I'll make it up to you. Promise."