My boyfriend discriminate me because of my accent

Me (21F) and my boyfriend (19M) have been dating for almost 2 months now. Me and him are both Vietnamese, but he came to America when he was 9 and I just cam here for about 3 years ago. Definitely, my English is not as good as him since he has live here for 10 years. I still have an accent when I talk to people in English and sometimes embarrassed me but i’m working on it. I thought my boyfriend is gonna understand it and tryna help me with my accent, however he said something that kinda hurted my feeling. In some situations, I can’t say something in English so I would say it in Vietnamese. But one day, I tryna say something to him in English but he didn’t get me so I said it in Vietnamese instead then he still didn’t get it. After that, he got mad and said “I’m not Vietnamese so i don’t understand what u say. You need to work on ur English cause i don’t understand shit when u speak English.” I’m an emotional person so that hit me so hard and i literally cried after hearing him saying that. It didn’t happen once but many times so I always feel scared to talk to him in English. Do y’all have any advices for me to work on my accent?