How can i be a better girlfriend?

I honestly love my boyfriend and I’ve treated him badly recently. To begin, i had a personal issue with friends and i took my anger out at him, but when i started to explain that it was going on, he ignored that text, so i said “nobody cares about me” and he was all like “i care abt u, but its this dumb shit that you do that pisses me off”

and then he said it was bc i said the “nobody cares abt me” he stopped texting me after that and I assumed he went to bed. I also sent a long ass chat on Snapchat apologizing;( but i really want to do better, but he has stuff he needs to improve on too. When he saw his friend of whatever, he literally forgot i was there and didn’t talk to me the whole time i was with him. How can I improve though:/ i felt really bad about how i treated him tonight