[Fat_Hippo]

Zomboid, it's natural. There are some people that you can stay friends with your whole life, and some which just get plain tiring after a while. For example, one of my friends, who always wanted to fight and tell these ridiculous stories about how he got into fights.
In the beginning it was amusing, but after a while I'd had enough of that shit, and I told myself: "Why are you hanging out with this moron?" This happened at about the same time as another one of my friends got tired of him too. Then he started smoking, coming into school drunk and flunking all his tests, and now he's repeating the year, so I'll doubt I'll see him much more.

So you see, some people just get tiring after a while, or in your case, you simply outgrow them.