<human>: Bear with me as my other half spends a lot of time on Reddit so I have to be a little ambiguous with some of the details..

Okay so I'm in a long term relationship with my man, we are both in our thirties and 98.999 % of the time he treats me unbelievably well, I have no complaints. Not saying we don't have tiffs or anything, but for the most part we work things out okay. But he has this friend (friend is a dude)  and every time this friend is around, which isn't very often, he turns into a complete dick. Not in front of his friend though, he waits until we are around the corner or in another room. If I talk, he gives me this "why the hell are you opening your face" look and gives me some strained reply. He basically makes me feel like I'm an embarrassment in front of his buddy and when buddy is in a separate room, but same building, he will be a dick and either try to pick a fight, or hurt my feelings. And then he chills right out when buddy leaves and acts like nothing has happened leaving me feeling like a piece for however long it takes for me to get my head straight again. I was raised in an abusive home and I don't want to inadvertently end up in it all over again, but I know I have a tendency to over react, so a myriad of answers may be a good perspective builder.

Give me the gist of the text in a nutshell
<bot>: Boyfriend turns into a closet asshole when his buddy is around and starts emotionally treating me like garbage and messing with my head.