if you want something, just go for it
the more you think about all the possibilities the more you're gonna stand still, which is the worst thing you could ever do.
i think hugs can be serious or welcoming because thats bringing the person into your personal space, which is something we dont like to share with people we're not comfortable with.
if anything the worst that can happen is he says no. rejection isnt cool but its not the end of the world. its better than rejecting yourself from the possibility of dating him when you may actually be the person hes lookin for.
guys are no different than women. we all worry about the same things when it comes to ourselves and other people and relationships.
the only advice that there really is for you is to go with your instincts. trust yourself and you'll be surprised what you'll find.