Can your Husband take the bus?
We have only 1 vehicle (which I use)... and my Husband car-pools to work and catches the bus home.
Otherwise, we would be stranded. There is no bus-stop near where we live. And then I would not be able to take my daughter to school or pick her up, nor take my kids to their appointments nor mine.
Or, put your son in a stroller and walk around... and go places that way.
Sure, its normal for a SAHM to get 'bored' being home and with her child. We are not an 'entertainment center' and we need stimulation too, socially. And boys are active.. they need to run around and you are his play-mate.
have a daily routine with him... go outside, play with a ball, jump around, play hide and seek, play in the tub, finger paint etc.
Having a DAILY routine, helps. Then that way you are not just hanging. ALSO have a daily nap time... then that way you get a break. And babies/kids STILL DO NEED naps. Or they get fussy/needier/ and not happy.
And, incorporate him INTO YOUR daily chores/routines. That's what I do. My son, who I am home with, KNOWS "my" routines and necessary things I need to do everyday just in the household. He will play while I do that or he 'helps' me... and I teach him that way. I also tell my son "Mommy needs to do some things, you can play by yourself for now, okay?" And he understands.
Its okay to not be CONSTANTLY playing with your child.
My son knows that Mommy does chores and 'work' too... and that I always tell him, what "we" will do next.
I have even on occasion, just told my kids that "Mommy doesn't feel like doing anything right now... I'm tired. Give me a moment. Then we'll do something..." Its okay. My kids understand... my daughter will even tell me "Mommy its okay, you played with us a lot today..."
Or invite people to YOUR home.
all the best,