Maybe talk to your boyfriend about how you feel - not ALL of it necessarily (it might hurt him to know you like flirting with other guys, and he might not be able to see it rationally), but maybe about the reasoning behind it. Tell him that you feel a bit insecure about the fact that he doesn't compliment you enough, and that if it is something he feels then you would like to hear it from time to time! I think a lot of people like attention, but this may be more because you don't feel like you're getting enough from your boyfriend, so you are looking for it elsewhere - I don't think it's wrong at all, but I think you have to address the reasoning behind it.