I know different things work for different people, but judging from some of the posts I've seen I feel like a lot of people want a relationship where they barely see their partner.
No interest in living together, then I see stuff like 'I'd be ok with my partner going out 5 or 6 evenings a week because I like the time to myself/I'm introverted'.
So I think do you actually like this person, and do you just want a casual relationship? You can hardly call it serious when you have no interest in seeing them more than once a week or so or progressing any further.