First off for background, I'm single and live alone. I'm also an only child who grew up in a very remote area so spent a lot of my childhood and teens entertaining myself rather than spending time with friends.
I have a few close friends that I speak to or see regularly but sometimes I go through phases, and am going through one at the moment, when I just find them irritating and can't be bothered to spend time with them or even talk to them. Eventually, after a bit of time (I've never really measured it but I'm guessing it's minimum 2 or 3 weeks), I'll come round and want to speak to them again but it's probably one of the reasons my friendship circle is so small as some people obviously want more consistency from a friend. BTW, I don't express my irritation during these phases, I just put very little effort into the friendship and will actively avoid catching up with them.
Am I weird? Do I have some social dysfunction? Or are there others out there who feel the same sometimes?