How should i apologize to my boyfriend?

[J]

Give him a little space right now. I would go see him in person rather then a message or phone. But since his phone is off and he probably doesn't want to see you in person. So just write a message like: "I am sorry that I get so sad and mad over the smallest things! I will try to change that because I know it affects our relationship. I love and care about you very much" If you get mad or sad at him next time: First take a deep breath. Don't type or say anything you will regret later. Use "I" statements in a calm voice. Don't put blame on him or make excuses. Take responsibilities for your actions.