Don't think I feel the same anymore?

We've got a 2 year old and a 5 week old and I just don't think I feel the same about my boyfriend anymore. We've been together about 6 years and lived together for 3. Lately I feel like he's on his phone constantly playing this bloody game he's obsessed with, or messaging the boys about it 🙄 he's 35 I should add! He doesn't cook or clean, and some nights we barely say 2 words to each other then I go to bed. He's pretty good with the kids but lately his patience with them just seems to be wearing really thin. I don't know if this is postpartum depression or my feelings have just changed, anyone have any advice? I love him, I'm just not sure if we have a real future and it hurts because I've always wanted a 'proper' family with a partner and children. I've got that now but worried we won't be able to keep it...