M.M.
Hi L.!
It's normal for children around 2 to 3 months to start looking around during breastfeeding - they're suddenly more aware of their surroundings and are simply fascinated by everything.
It's also normal for breastfeeding time to reduce dramatically around this time - my dd would take 45 to 60 minutes for every feeding until about 2.5 months, when it dropped down to about 10 minutes per feeding. They just become more efficient feeders. He may very well be getting all the milk he needs.
A few thoughts:
1. don't supplement unless he is not gaining weight and/or not producing 6 to 8 wet diapers every 24 hours and/or not pooping. Although, some babies around 3 months or so will switch to pooping just once every few days...if in doubt, get an appointment with a Lactation Nurse. The weight gain and wet diapers are crucial, however - if he's gaining weight, peeing a lot, is generally happy and interested in his world (as much as an 8 week old can be!), you don't need to supplement - this will only diminish your supply.
Of course, if you WANT to wean him early, supplementing is the way to go. I just wasn't sure from your post if that is what you want to do.
2. Try breastfeeding him in a quiet, boring room - as dark as you can make it. It will force him to just focus on feeding.
I hope this helps! My guess is that nothing is wrong with your supply, he's just growing up and becoming a more efficient eater AND more aware of his surroundings.
Congrats on the baby!! M.