[castlecrasher2]

Our 7-year old has the same thing. My main advice is to not fret and stay calm as time is the real solution.

For the clinginess, some tactics we've used to account for it is to setup play dates with other kids.

For the meltdowns, we simply ignore them in the moment as best as possible. They settle down eventually.

For the picky eater-ness, he eats what we eat and when he throws tantrums he gets an early bedtime. His body compensates for the extra hunger the next day.

For trouble falling asleep well we're still dealing with that one. We've resolved to just let him read quietly in his room until he's tired and wake him up at a reasonable time.