Someone once asked...
Someone answered with kindness...
You are not alone in asking this question, I've asked it of myself before. They say that your personality is a culmination of all of your interactions throughout your lifetime. The 'real version' of you isn't any one of these personalities that you exhibit in a single interaction, it's a combination of all of them. You might be loud and funny with one person, then shy and quiet with another group. It's the same person inside. It's the real you acting every time, just acting differently to different environments. Humans mimic other humans all the time, it's in our nature. That's why our personalities change and develop and get richer. Don't ever feel like you have to change yourself.