Last night, Xander took over two hours to go to sleep after we put him to bed. He just kept crying for us and didn't seem to want us to leave him.

Tonight I've gone in there once, took him to the potty, sang him an extra song, gave him an extra hug and kiss and told him I wasn't coming back. He's been crying/whining for almost an hour now...

Should I go back in and check on him again? Or is it okay to let him keep crying?