I'm with Bath - ignore ignore ignore!

We Co-Sleep - this wasn't what I planned but it works for us and keeps me sane.
I wear Blue in a HAB when I need to eg: he absolutely won't settle, I need to cook or my back is killing me from carrying him in my arms.
I let Blue sleep on the couch tucked into a triangle pillow etc.
I demand feed - which at the moment is every hour and a half during the day and maybe every 2 hours at night....but we have times where he can go up to 5 hours.
He sleeps well at night straight back to sleep after a feed 99% of the time- But can be a little hard to settle down to sleep.

Basically he is always with me or within my sight.
Sounds just perfect to me. You're doing a fantastic job

Nothing is a bad habit if you're prepared to do it.. and that simply means it's no one's business how you do things. Feeding through the night, or feeding to sleep is not something they do forever. Granted, mine did it for a couple of years LOL.. but I was prepared to do it, so no problem, and they outgrow things and change all the time.

No, you won't overfeed a breasted bub unless you're making them take a bottle top-up.

4. He is generally happy and content and laughs more than any other baby I've been around in my circle of friends who have strict routines....
That just says it all to me.. you're doing everything just right as you are

I bet if you wrote down your day tho, you'd find that you're slipping into your own routine WITH your baby, not forcing him into your own routine. Don't stress, you're doing great