Hi, welcome to PsychCentral. I would first figure out how to articulate what the real you is like? Would you like people to see your sense of humor or that you like to read comic books or what? I have a wicked sense of humor with myself so I started talking out loud, arguing with myself at work :-) and amusing my coworker friends. Start to recognize and actually "do" little things that occur to you when you are with other people, make "that" comment, follow through on that urge to invite yourself along to something that sounds like fun or to invite someone to come with you somewhere, etc. Bring a book to work and read it during lunchtime and let people see what you're reading and tell them about it or, like we did at work, have Hearts tournaments with coworkers. Figure out ways to be yourself like you are when you are only with yourself. Transplant those thoughts and actions to when you are with others.