He wants you to think about him 24/7
Your boyfriend might want to make sure that his image is constantly on your mind. Once you smell that something is wrong he changes his tactics and becomes nicer, more polite and sweeter to you and your family members. This is simply another trick manipulative men do when they want you to remember them throughout the day. Dump him – you deserve someone cooler.

You have never had a proper chat with him
This sign tells a lot. Pay attention to how you start your conversation and how this conversation ends. If your partner goes offline without explaining why he needs to go, then he is just an indifferent person who thinks that only his feelings matter. The same rule applies to all sorts of messages and dialogues. An honest man will always end a chat properly.

He is good at manipulation
Try and talk to him about something serious. Observe his behavior and reaction. How sincere and frank are his answers? If his reaction is negative, it means he does not take you seriously and wants all sorts of topics to end. This is a warning sign as well.