"Oh….? Around….none of your business." He huffs, "Haven’t you heard that asking about one’s age is rude?"
"…." His gaze wavers for a moment, "Unless something happens that makes you live forever, then yes, I probably will watch you die." Unless, someone killed Beelzebub first, which wasn’t likely but still possible. "And you may do what you like…" He wouldn’t stop Trip from leaving, but if they stayed together until the end, Beelzebub would be loyal the entire time. He was a demon that lived by code, a rare one.
"And we both know the chances of me running into something that would make me live forever is zero. So you’d get to watch me rot away day by day. Would you miss me when I’m gone?"
Beelzebub stares at Trip and blinks, “I’m a demon. We rarely possess any emotion.” So, it was a ‘maybe’. He leans forward, “Why? Want me to miss you or something?”