Invitations

When I'm invited to go hang out or do something with someone, I want the person in charge of the event to invite me. If a friend invites me to hang out with another friend or go do some sort of activity, I won't answer or if I do it will be a very vague answer that can't be interpreted as a yes or no. If I want to do something with someone, I want to make sure everyone is comfortable around me, or that I'm comfortable around everyone else. Usually it's just my sense of right and wrong, understanding that I shouldn't invite myself over.