Is it something I did?

Last night I was on the couch with my daughter, and he was on the chair opposite. Conversation was normal and we were laughing at some of the funny things the baby was doing. He started to close his eyes and usually the baby will go up and tickle us if we pretend to be asleep. So I whisper "go and tickle daddy" out of nowhere his mood completely changed. He got up with a filthy attitude and went to go back on his laptop in another room. I asked him what the matter was and he was snappy and told me to get away from him, he hates me etc. Just for the record he wasn't even busy that day or tired. He'd literally came off his laptop, spent about 10 mins with us, snapped and went back to his laptop. This is just one of a million examples of his behaviour. I can be upstairs cleaning or sorting out the clothes and I can hear him speaking bad about me to himself from downstairs or if I'm upstairs and he can't find something he's looking for it's my fault. I ask him what's wrong and he just says "it's you, it's your fault" even though I'm upstairs away from him. Our conversations go from normal to him hating me within a split second, even if I'm listening and not talking. It seems every single thing I do, he hates. I'm leaving him... I already have plans in place. But I still have to stick it out for a few more weeks, but I'm so fucking over it. Is he narcissistic? He does gaslight me 100% he'll say something under his breath or he'll mouth something and I'm clearly watching what he's just said and can hear everything but he'll say he didn't say anything. He's hit me and said he didn't, or he plays it down and says i made him do it. Because it's my fault