I have a great trouble with this, and problably ADHD too. So one of the hardest thing for me is stay focused on the table. I rather multitabling so I don't get so bored.
If You boring watch your opponents, how he are playing. What is his range bet, how often he is opening bet pre flop, how often he is betting after someone checks. how many times open pre flop. how many times he is 3 betiing and make notes of your opponents. trust me if you watch for all of them you can be bored