Birthday party

My 6 year old has a birthday party to go to at a friends house in about 20 mins. Usually I’d drop her off and leave but she’s only lived with me, out here, for about a year. I don’t know these parents or the others showing up. So obviously I’m staying. My husband has known for a month and a half (they planned early). I’ve asked him to come and he never said he wasn’t. I kept telling my daughter “dan and I will be there” he agreed. Now day of.....? He’s supposedly not coming. He’s sleeping currently: I’m pissed. Normally I wouldn’t be but I’m going to be with a bunch of strangers, I’m awkward and with my husband there I usually calm down a lot. I have socially anxiety and a borderline personality disorder. Really, I hate going anywhere without him. He knows this. Now being a Gemini, when I come home I want to be petty as fuck to him but I’m going to try not to be 😂

I just don’t get why he can’t do this when I’ve gone out with him and his buddies whenever he’s asked.....