I've read that the average friendship lasts seven years. I think it's normal for us to have friends for a while and then drift away from them and form new friendships. A lot of friendships are proximity friendships, people we met from school or work or some shared activity. After a while, when we no longer have that shared activity, those friendships often peter out.

Yes, I find that it is also hard to 'reenter' after being cut off for a while. I have to take baby steps for a while, but it does get easier.

Also, you may be forming friendships with the wrong people, if that makes sense. I had the same worries that you had, that there was something wrong with me for feeling like I wanted to dump my friends and find new ones every few years. I finally realized that the problem *was* me, but not what I thought it was. I was bad at choosing friends! I consistently formed friendships with people who just wanted me to listen to them all day. After a while, yeah, that gets boring!

I noticed that you mention that you have good listening skills, so I wonder if that is coming into play for you as well?