Did I say anything wrong?

So I was talking to my guy when he told me he's failing in school.

I asked him why and he said it's maybe weed or the new environment (He currently left).

So I got really concerned about the weed aspect. I told him to look out for himself. Afterward he said why would he not look out for himself and I said what about the weed and whatnot.

He did not respond to this. So my question is, have I said anything wrong to piss him off or?

Did I say anything wrong?
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