Just stating how life is and how it has its ups and downs and somethings just happen.

It be like that sometimes means you're used to being sad or you're used to getting a whole lot of crap on your plate it don't surprise you no more
It be like that sometimes is making a joke out of a situation you're in
Usually a disappointing situation

A phrase used when there’s simply no explanation so it must happen occasionally ; similar to phrase “gonna have to”

Phrase often used to show that you feel sympathy, but don’t care too much about the situation.

honestly, a phrase that can be said in any situation.