It's hard to say for sure. Manhwa often have twist and turns. The boy next door could be a vampire if the story takes a supernatural turn and reveals it later on.
Overall, 'Do It Next Door' manhwa could be about various themes like love, friendship, or mystery within a neighborhood setting. Maybe there are secrets being uncovered or heartwarming moments shared among the characters.
I don't have a definite answer. Maybe it'll come back when the storylines and art are ready for a new installment. Just stay tuned for any official announcements.
Taking back Manhwa Chapter 65 is unlikely to be possible. Usually, once a chapter is made available, it's there for viewing and can't be reversed. But you could explore if there are any special circumstances or options mentioned by the publisher or platform.
You could start by having an honest conversation with him and expressing your feelings. Maybe try to figure out what went wrong and work on changing those things.