Every time my boyfriend gets angry, he blackmails me. He doesn't answer his phone or return his text messages. What kind of psychology is he?

You should calm yourself down. If he just gets used to you, do you want to be someone else's habit? The most terrible thing about habits is that everything you do for him is right, but he will appreciate others' kindness to him.

If he does this to you now, it will always be like this or worse in the future.

You need to calm down and find something to distract yourself. If he doesn't contact you, it means you are dispensable. You don't expect him to contact you now, but you have to think for yourself. If he had you in his heart, he wouldn't have such an attitude when this happened. Now, don't get too close to that boy. After all, he will think too much.