The new members of your social group or work group are starting to have a big effect on the dynamics, and you're not so sure you're liking it. Give it a few more days before you write them off completely, though. Sometimes it takes time to dig beneath the surface of people to find out what really makes them tick: and whether or not you like it. You could speed up the process if you open up to them a bit more. Show them who you are, and they'll show you who they are.