Why is it uncomfortable to snuggle with family for me?

A lot of people seek comfort from their friends instead of their families, especially during adolescence. You are growing away from your family, and seeking independence. Your brain is getting mixed messages because you feel like you should be out doing your own thing, and cuddling with family is reminiscent of when you were little. It may go back to normal when you grow out of the stage you are going through right now, but its normal to feel the way that you do.