Is it bad when your girlfriend says i love you to her guy friends?

It's not necessarily bad that he doesn't tell you he loves you in front of his friends; he may just be shy, or embarrassed. But does he treat you differently in front of his friends? If he treats you like dirt in front of your friends, but is always such a gentleman when you're alone, there is a problem. Ask him why he's acting so differently, but make sure you don't sound too desperate.