Man it's pretty fucked up how everyone's like "definitely must be a yandere, stay away from them in real life" maybe he will be but so far we've only seen that he's a bit obsessive, something plenty of real people are and aren't a danger because of, it's only a problem if they leave it unchecked and lean into it.
Most definitive thing is whatever that hidden part of his room is but it's pretty presumptuous to assume he must be a danger just because of what we've seen so far.