to get to know each other you don't need to ask questions about each other
Stumped as to how the fuck else you manage it.
everything needs to be 50/50
Like what? Splitting bills, maybe fair enough. Otherwise, bit weird.
and doesn't want to celebrate any occasions with you
Probably because they're celebrating with someone else.
Doesn't like kissing in public
Might just not like PDAs, but also, see above.
won't invite you around their home or even allow you to sit in their car.
Ok, in total, that adds up to them being married. I'd just end it. Even if there are other explanations, all of that together is just annoying. I don't care if they do like Paul Rudd, with Bill Bailey's humour thrown in.