Do you find you're able to forge strong relationships (friendships or relationships) as opposed to just acquaintances when you spend so little time in each spot? I moved around every 2 years growing up and hated it, but it's a bit different when you're in your mid-20's I guess. I have to move again in less than 2 years after living here for 3 1/2 (longest I've ever lived anywhere) and I'm honestly dreading it. I don't want to start over again.
Maybe it is a phase and you'll get tired of all the relationship abandonment and the overwhelming feeling of wondering why you're even trying to get to know people when you're just gonna remove yourself from their lives anyways..
Though living a nomadic lifestyle is a great way to broaden your horizons and become very good at befriending and relating to people that are different than yourself. It becomes a necessity, whereas people who never move and have always had the same friends don't often find a real reason to use those skills.