Young peach tree bark splitting?

I have a young peach tree that has been planted for its 2nd year. It's bark did not look like this at the beginning of Spring or during flower, I inspect it like crazy because I'm attached to it for whatever reason. I'm noticing as it gets more foliage at the top the wind is wipping it around a bit - should I stake it down? I was told staking is bad and I should only do so unless the tree is unstable. Any advice appreciated