I remember those days.. Riley at 8 weeks old was a non-stop pup.. she never even understood naps until she was about 3 months old.. she would just keep going until she passed out.

It will get better though! Just let him know that he's got to be on your schedule.. when you want to play it's playtime, when it's quiet time he needs to learn how to relax. Even though he's still a baby and needs a lot of attention, he has to learn that by crying he's not going to get it.. or for that matter, get attention ALL the time. So yeah, probably ignoring his crying when you need to is the best thing.. maybe give him a puppy kong full of peanut butter if you need to shut him up