We all have different levels of closeness with our friends. I have some friends that I see multiple times a week, others I see at least once a month, and a handful that I never really hang out with one-on-one. It’s perfectly normal to realize after a couple of times hanging out with somebody that you don’t particularly want to hang out with them again. They might be a fun person to have around in group settings, but you don’t have enough to talk about to facilitate hanging out for multiple hours and sustaining a conversation the whole time. 

Many people are hesitant to tell an acquaintance, «Hey, I don’t want to hang out with you,» when asked. Instead, they just reject the offer again and again, hoping the other person will take the hint. After all, they probably haven’t had a headache every single time they were asked to hang out.