Do you think it's unreasonable to be upset if a guy takes 12+ hours to reply to my texts but claims he's interested in me?

Anonymous
I understand when he's genuinely busy but sometimes he'll be on Twitter and Instagram, posting things and talking to other people, yet he takes forever to reply back to me.
Do you think it's unreasonable to be upset if a guy takes 12+ hours to reply to my texts but claims he's interested in me?
13 Opinion