My husband doesn’t want anymore kids

When I met my husband we talked about kids & I told initially wanted 4, well when we got married I was 34 so I said I’d be happy with just 2. We talked about it before the marriage & we were in agreement. Now I’m 38 & blessed with a sassy 2.5 year old girl & am beyond ready for another. My husband has a 15 year-old son & decided he doesn’t want anymore because he’s tired & doesn’t feel like he has it in him for another. I know he’s entitled to feel the way he does & clearly I can’t/won’t force him to have anothrt child but I just feel so cheated. Just having a little pitty party overhere