“I don’t know who you are anymore”

My bf and I got into a bad fight and and he tipped me off the deep end. I got VERY angry and usually I don’t. At some point he says “I don’t know who you are any more, you’re being so mean. I don’t know who you are anymore and don’t understand this”

I usually don’t get VERY angry or yell or say mean things. I would deem myself mild tempered, quiet and overall a shy individuals. I grew up in a household where there was yelling, physical violence and more so I don’t like that.

Last night I raised my voice and got really angry in response to things he said to me but now he “doesn’t know me any more” or “this isn’t my usual behavior/how I act”

To me I’m like wellll......if I’m usually not like that then what has changed to possibly push me to that limit? Why is it my fault that I respond that way when I haven’t before?

What do you think?

****UPDTAE****

The argument was that he was making advances to have sex with me and I denied him because I didn’t feel too fresh and it was late at night and I had work early in the morning. He started to pout and I told him I don’t think he should be acting that way. He and I then argued and then what ticked me off was that he told me he thinks I was addicted to opioids after taking pain medicine for 12 days. The medicine is for my tonsillectomy. Now he treating me like a drug addict saying I’m in withdrawal.