Beware I am complaining lol

I don’t know if I’m in the wrong but I don’t feel like I am. Earlier today I asked my boyfriend if we could go see the lights, just him and I. So he asked his mom to watch our son. She said yes and said why don’t you ask grandma to go. Well that just shot my plan down. I get out of the house to do my own thing that I can’t do around anyone else. Which means sometimes I like to smoke a doobie and since I can’t at home with the little one, this is what I do. Especially in the freezing cold weather. He knows this, shit he’s the one who bought me the ounce and every single time I tell him this is why I get out of the house. Like the fact he forgot is weird, I am a creature of habit so I mean nothing is really new. Now he’s mad at me because I changed my mind on going. Idk I can’t smoke around her because she just don’t like it, so I decide to give her the respect and stay home. He got so mad at me, saying it’s my idea blah blah and it was my idea. However my idea was completely different now that I found out she was going. I don’t have an issue with her going sometimes I just need to do my own thing when I have the time. It doesn’t make much sense to me but here I am doobie packed and still can’t smoke bc idk if there will be a big dispute when they return smh. Me sitting in the back I’m very soft spoke nobody can hear me anyways. So what’s it even matter anyways? Still don’t get out the house