He always has some stupid excuse for everything he does and the way he acts. It’s like he’s not even trying to make up something more believable. If he always comes up with something when you try to confront him and doesn’t want to talk openly, be sure that something’s fishy.
When my ex, who always used to seem honest and direct, started making lame excuses, I knew something was up! And I was right. After countless arguments and attempts to mask his behavior, he got tired and finally admitted he was seeing someone else.