My experience has been that they usually chase me, albeit with a knife or loaded gun. Coins are safer.
It's a little more than completely natural, it is way beyond common for coin collectors. The vast majority of collectors got through periods in their lives where they stop actively collecting for a while, only to pick it back up again later on in life.
I think all but some of the newer members know this - I sold my entire collection in 2006 - and haven't bought a coin or collected any since. But that doesn't mean I lost my interest in numismatics, far from it. For those who don't know, I started collecting coins in 1960 and continued to do so, with a few brief interludes due to life mixed in, until 2006. It was then that I finally discovered something about myself. That what I truly loved about the hobby more than anything else was the study of coins. So that's exactly what I did, I sold my collection and continued to study them. I also continued to write about them, to teach others about them, to help countless others with their collections, and to share the knowledge about them that I had spent my entire life acquiring. And I still continue to do all of that every single day ! But I no longer collect coins at all, and haven't for almost 20 years now.
I took about a 7 year hiatus from the hobby due to college and starting a job after school. At the time, I had very little extra money for coins. I agree with much of the above. Once you get done with college, settle into your work, etc. I think you'll circle back round. But, you have an opportunity to watch from the sidelines now, keep up with the market, read a few numismatic books/sites. Though you may not be actively collecting, you can still increase your knowledge!
Perfectly normal. It happens to me 2 or 3 times a year. And then after a month or two the thrill always comes back. It's been that way my entire collecting life.
Here's some advice: keep what you have! You'll probably regret it if you get rid of it, and then want it back later.