Odd hours and frequent cancellations may also herald a guy who's not being completely honest. Consider how often he picks up when you call. Maybe he reaches out to you by texting or calling quite a bit, but when you send a message, all you hear are crickets. There's a legitimate excuse for missing your calls if he's at work or you know he's otherwise engaged, but not picking up regularly is a warning sign. If you notice girly stuff at his place, be wary. Even if he says they belong to his ex, why would he still have them out and not boxed up to return? Obviously, he's not being faithful if you notice obvious female items – we're talking tampons, razors, an extra toothbrush he isn't using, etc. – strewn around. Take a look around and consider his behavior, then confront him calmly and directly.