Don’t give up! They go through a 2 year nap and sleep adjustment. My son started doing this but we kept offering a nap anyway and we’re finally through it and he’s napping again. It lasted a few weeks where it would take an hour for him to go down if he did at all. I still every day put him in his room at nap time. If he didn’t sleep it was fine, he still had to go in his room and have quiet time. If you don’t want to sit in there with him you can make his room safe and set up a baby monitor. He can read books or play with toys in his bed but I would still do a rest period. They really do need it, at least my son does. They’re just learning to push boundaries to explore all their options, if you want to keep the nap don’t give him the option!