I've been told by friends that know me incredibly well that any guy I've ever been into, they would never have known. I'm really incredibly guarded, and I instinctively measure my responses to people, even when I'm not trying to and by the time I'm done it's too late. I don't appear cold, just like a friend, so that any advance I make just feels so out of place. I'm terrible about putting myself out there. Any help?