AIO for breaking up with my bf because he got mad at a song I sang

So yesterday me(F18) and my bf(now ex)(M20) who I’m going to call A went out on a small little date just to pass the rest of the day away. On the way home A let me play some songs that I liked and one of this songs was called ‘back to friends’ which I included in the slide. I find this song extremely catchy so I had the radio turned up high and I was singing it really loudly. Lyric for lyric. At the time A didn’t seem bothered whatsoever but when he dropped me home, about 30 minutes later he sent me that message. I find this whole situation completely ridiculous. And when he suggested a break I completely broke it off because I don’t do breaks. If you’re questioning a relationship with me then that is it. But I feel like maybe I overreacted and that I jumped to it too fast. I’m just looking for some feedback. Can someone help me out?

Me and my ex he is talking about broke up in October and me and A had been dating since Christmas. He asked me out at a light show which I thought was cute lol