Even though Buddy had a good routine every evening to go into his crate and did not seem to mind to sleep there, Stuart and I decided that it might be time to let him be free at night.  A few nights ago we led him to his crate but without closing the gate before we proceeded going upstairs; a few minutes later, Buddy discovered that the gate was open and later he moved onto sleeping outside our closed door the rest of the night.  The next few nights, Buddy had already learned and just followed us up to upstairs.  The past 2 nights, we left our bedroom door opened just in case for Connor (more on that), Buddy proceeded to come inside our room and just laid next to our bed to sleep.  At least he had learned not to bother us until we are awake the next morning.