Why my bf never tells me the reason of his anger whenever he gets angry with me?

once my bf got angry with me when i talked to his friend. he thought that i called his friend to make my bf. he also became angry when my phone number was coming busy, he thought that i was talking to some guy. he always do like this but never tall me that why he is angry with me and i have to request a lot to know the reason and when he tells me the reason i used to clear all his doubts. but he never responds at that time as he believes on what he think but after some days (i don't know what just happens to him) he used to call me and start talking to me again as he start believing in me.

your boyfriend love you very much. My boyfriend used to be the same way for three and a half years! Finally, he decided he could not go on like that and that he should just trust me. Then miraculously, our relationship really started clicking. We are good, up to this day. We are love, and trusting. Your boyfriend has to decide and be motivated to trust you, and you need to affirm your love towards him and let him be absolutely sure that he is the one for you- nobody else. You may need to sacrifice A LOT during this process like I had to. I did not talk with any of my male friends. I devoted my life to only my boyfriend. I gave him absolutely no reason to doubt my feelings towards him. He is ashamed to admit to you how jealous he is for you. Don't push him into saying things he's not comfortable with. Understand him, if you love him and if you'd like to stay with him. Love is nothing but sacrifice. Love turns sacrifice into joy. If YOU love him, then be patient and willing to sacrifice for him. In time, things will work out. On the other hand, if you're not willing to do any sacrificing on any part of your life, then go ahead and move on and end the relationship. If you keep going, you'll get very tired and both of you will end up hurt.