>>1 it's not the worst fear to have, frankly I don't like to get too "touchy" with people and it really isn't necessary of me, or you, to either. However, you need to realize when physical contact is necessary and the best way to get used to it is to occasionally hug your friends, like when they need it, or when you feel grateful towards them, just make sure they're people that you trust.
On the subject of romantic affection, you shouldn't make physical contact with anyone unless you actually want to, not because you feel obligated to. Physical affection should only be made when you're ready and comfortable with it, and there's nothing wrong with being scared about it, that's normal and it's important to find someone who makes you feel safe when in a relationship. I hope this helps :3
