have a good time

Have a good time
You should be a guy who is happy with himself and his life. People who spend time with you, mainly like enjoy the relax and happy time with you, so be a little bit sunny, easy going and down to earth relax, that should be helpful to you relationship with your colleagues. Don't complain life everyday, especially with someone who isn't necessary share your sorrow with you, your life is your problem, not others, you should try to find some reason of yourself.