I just want a happy house for my children. They don’t see or hear any of this as far as I’m aware. They are both very close to me and would say it if they did.
This is so naive.
You describe an unhealthy, unhappy, tense and toxic dynamic between you and your boyfriend.
Yet you think your kids don't notice any of the above?
It's not good enough tbh to think / hope they won't.
It's so bad you are too embarrassed to let a friend visit as your boyfriend has been drinking all day.
Yet your children are living in the same environment you're too ashamed to let a mate see:
Most of the time I just hope the children won’t notice. He’s not horrible when he’s drinking he just sounds stupid like slurring his words and glassy eyed.
You "just hope" they won't notice.
They will though. If they have eyes, they notice.
Don't you want more for them than living in this dynamic?