Alright, don't follow this advice if you're one of those creepy people who are going to ask for a hug and hang on for too long. But look, if you are not getting physical contact from other people at least once a day, you are not taking care of yourself.
A hug can relieve stress, releases endorphins and raises our over all sense of well beings. Many studies have shown that babies who do not get held enough develop all sorts of psychological issue. So, don't do that to yourself as an adult.
Develop friendships where it's acceptable to cuddle during the movies, hold hands in public or drape on each other. Human touch is not just sexual - it's a necessity for a happy, healthy life!