My boyfriend threw his phone because of me

Hi everyone. I am currently in 3 yrs relationship with my boyfriend. And today something crazy happened. He was by me at home and his phone was on the couch. He was busy on my laptop so he didn't said anything after I went in his phone. I don't do this everytime just like once in a while if his phone happens to be in my hand reach specially when im bored. So we were joking with each other and laughing and he got this group message from his friends asking him to come around. He said he is not going. Then they replied saying please come around it will be fun. And because i was cracked up and trying to be funny In a second I replied ( he wasn't focusing on his phone) I said Mike is with me( girlfriend) after that I was laughing more then he said what did you do.. okay i will be honest I totally regretted doing this😢 .. i never meant to do it in a way to make him look stupid. Thats what he said after and he got serious and asked me what is this? Throwing his phone on the couch telling me that you don't do stuff like this. I already told them i am not coming they dont have to know why. And i got scared.. it reminded me of my previous relationship when my abusive ex used to take out his anger on things that were in his area.. i felt like crying but i turned away pretending that i was going to the bathroom. I sat minutes thinking about how things just went from laughing to be very serious. I didn't do this intentionally it just happened while we were laughing.

I'm just a little scared and it didn't got off my mind.. i wish i didn't do it and never went in to his phone. It brought back memories that i dont want to remember.

What would you do if it was you?