He puts his phone on airplane mode so that he is not caught.
You haven’t met a lot of his friends even though you hang out with him a lot.
He gives you just enough attention to keep you around.He just shows that he cares but actually does not. He is just after sex.
He does not value you so it takes forever to text you back..He never text you back immediately and says he is busy in works.
He follows sexy-looking, half-naked woman on social media .This is very serious problem. Your boyfriend has followed more than 100 of sexy women in social networking sites.
Your sex life changes drastically.He comes home and does not pay attention to you. Your romance is over. He is not interested in sexual activity.
See if he’s much nicer or more helpful. That is because of guilt as he is cheating on you. He might bring you a gifts or something which he never used to do. He might clean the dishes or house etc.
See if his mood changes.Sometime he is nice to you and next minute he is grumpy and angry.He might starts a fight with you and so on.