Becoming a manager creates opportunities, but it also can close some doors. Your relationships with co-workers change; friendships can be strained. People feel less free to be honest with you, and you feel less able to be honest with them. It's harder to sympathize with each other's challenges. In short, sometimes being a manager is lonely. Here's some advice:
Work your network. You may not want to talk shop with your colleagues off the clock. But you may have friends and acquaintances and associates, professional or otherwise, with whom such conversations would be helpful. Look at joining networking groups—or even starting one.
Don't work too hard. The more time and energy you devote to work, the lonelier you'll be. Don't be afraid to set limits. Devote some of that energy to things or people you enjoy outside the workplace, and you'll be more productive and creative—and happier—when you're on the job.