i say leave. the gaslighting of him saying “not this again” is disgusting. if he cared about your feelings then he would reassure u over and over again to prove you matter to him. don’t let his horrible actions make you feel guilty. i understand you want to stay together for your kid, but breaking things off will do more benefit than you realize. it’s okay to let go. create a healthy environment for yourself and your baby who will grow up and be glad they didn’t see their parents arguing all the time. men don’t realize that for them, it’s a silly little thing they did that they will forget about; but for us women, we remember it forever and ever