Comparison is the thief of joy.
Its really really hard to not compare and think that the grass is greener on the other side, but its not realistic that those peoples lives are as perfect as they are making it out to be. Most people only tell you their highlight reel, they dont tell you that it killed them a little inside that they missed out in hearing their babies first word because they were at work or that by the time their kids go to bed they are so exhausted they go to sleep too and theres not a lot of intimacy left in their relationship or hell that when no one is watching they binge on a block of chocolate a night. Or they suspect their husband might not be faithful..They just aren't talking about it because they want to project an image.
You want to be at home with your kids and thats what you're doing, thats wonderful! Its hard but you're making it work, your toughing out the hard stuff because being at home is important to you! Your life wont always be in such a whirlwind, the storm will calm and when the boys get a bit older things will fall into place.
Have you called and invited people over? Sometimes i get huffy when i see people doing things but never with me, then i realise that i never actually make the first move and invite them over!