Does he always do this? Make excuses why he is unreachable to you? Has it always been this way in your M? Him being unavailable/unreachable when it is a time when you should be able to reach him? Or is this something that has just developed?
If he has always been this way, then I would have to say there is no radar. If, OTOH, its something that has just developed, maybe there was some reason he didn't want to talk to you? A reason he was maybe not where he was supposed to be? I don't want to be the one to throw doubts in your mind, but isn't that behavour of someone that doesn't want it known where or what they were doing at the time they were unreachable?