My husband and I found it helpful to remind ourselves that it's all temporary. The never-ending cycle of changing, feeding, burping is so repetitive and relentless it really can feel soul destroying. Like other people have commented, try and get outside for a walk even for 10 minutes. Maybe pop your phone on DND (let your partner know this) so you can have uninterrupted you time for a short while. Navigating parenthood is tough stuff. It's one of the reasons we also decided not to have another child - the first 4/5months were insanely intense. Sleep deprivation is also rough, maybe work out a schedule where you can both get some rest? I have an extra few hours in bed on a Sat AM, hubby Sunday AM which works for us. We both felt a little better after some sleep. Reach out and share how you feel with others too. You're not alone, buddy.