He may enjoy some dags out with your toddler? More than the park, I mean. Even if it's the zoo or an aquarium? I personally find that those can break up a week. Or even have him find a dad group? I know they're not permanent solutions, but just to see how awesome family life is
Let's be honest, family life (especially with kids under 4) IS mundane and relentless! My older kids are 14 and 10 and I enjoy days out with them so much more now they're older. My baby is 8 months, so she's our demanding one that pretty much dictates our lives right now lol. Do you and your partner actually spend any quality time together? Are you being too rigid about your toddlers nap times etc? I'm not seeing anything in your post which suggests that you all spend time together really.
I recommend reading fair play, you seem to take a lot of the mental load as well as a lot of the house work. You sound amazing and so strong and it must be frustrating your partner doesn't see that.
Hearing that is hard. When you speak to him tell him that you feel the same way (you get lonely, bored sometimes, miss your old life, etc). When you share some kind of feeling, he might be willing to open up more or not feel so bad for feeling the way he feels. I also feel like it may be because the second one is coming soon and he's just imagining how life is going to be. I think now that your toddler is nearing 2yrs old, maybe be a little more flexible with his/her nap schedule and sort of teach the 2nd one to nap anywhere? Obviously not every single day but couple days a week where you guys go do something together as a family and start doing things together as a couple. Try to make it less mundane and depressing. It's not a reflection of his love for you or his kids but it's a reflection in that life is totally different than it used to be and will be for sometime.
Couples therapy! 🩷 he might also need individual therapy.