I will just be upfront from the start and say what I said and get it out the way. I know what I said was wholly unreasonable. But in my defence, I was being deliberately goaded into saying it. A brief bit of background before I say what the comment was: My boyfriend (we are in a same sex relationship) has a younger brother who is considered the golden child of the family and always gets what he wants, no questions asked. He is quite arrogant and thinks highly of himself but my boyfriend puts him on a pedestal and is always fussing about him. I am not enthralled by him and he seems to take great exception to that.
A bit of background before the incident: My boyfriends brother is very annoying and will deliberately wind me up sneakily and then act like nothing happened. For example: He will make nasty comments and then pretend he didn't say anything when I react and sit back and act innocent while I am reacting to what he said. He does it a lot. So yesterday, after it being very relentless all day, I ended up snapping, big time. He was constantly sniping at me, having a go at me about a word I had said by mistake, constantly going on about it, making me out to be stupid and thick, so in the end I said "you're lucky I don't sock you straight in the mouth for saying that". He didn't respond at first but then started staring at me in a sarcastic way so I said "Carry on looking at me like that and i'll smash your f*ing teeth right down your throat". I'm not going to put my hands up and try to argue with anyone that saying that was of course unacceptable and unreasonable from me. I'm not going to argue against that. I feel embarrassed and ashamed I spoke to him like that. He did wind me up, but that is not an excuse at all. I was drunk (we all were) but that is not an excuse either and I'm not going to hide behind it.
I am in 100% agreement that I should apologise but I also feel like it's not all completely my fault and I either do not need to apologise for it all, or also deserve an apology from his for his hand in it by purposely winding me up. My bf has said his brother is very upset (I don't actually believe this, I feel like it's a ploy to drum up sympathy for himself and to make me look worse) and has said I need to apologise, which I agree with, but I don't think I should be made to give one if not getting one back. Just gathering opinions: Does anyone think my stance is unreasonable from reading that or understandable where I'm coming from?