Moving in together can put a strain on a relationship. You learn so much about the other guy and not all of it is pretty or to your taste. There are a lot of things to work out and compromise on which can be annoying if you're not used to roommates. If you value the relationship, don't do it until you're really ready to see if you can make it as a committed couple forever. Unless, of course, you just need a roommate but think through what will happen next if you don't stick it out as a couple. Who will move out? What will the rent split be? Utilities? Other expenses? Who goes to bed when and gets up when? If you're no longer dating, a lot of these things suddenly can get in the way of the relationship. Bathroom habits? lol It obviously can work but it fundamentally changes the relationship so be prepared for that! The good side of the coin is that if it does, you have a partner, not just a boyfriend.