Lazy day

From the moment she heard him talk, she fell in love with him. And she got all the hints: sleeping in the same bed, falling asleep on his shoulder,...
they seem like couples things.
But there is a problem they both are sarcastic as fuck, and don't take anything seriously.
But,...
Maybe that's not true?
Maybe one of them does?
Maybe the other does too?
Maybe they are both insecure about other's feeling towards them?