If a guy is teasing you, is it a good sign or a bad one?

Anonymous
For example, I'm texting a lot with this guy, and we are pretty close.
For example : we were talking about pizza, and I have it like once a week at least, so I was like "if I keep on eating it so much I won't fit in my clothes by the end of the month haha" and he replied :"yeah, the last time I saw you, you were already fatter then before, can't imagine how you're gonna look! Hahahaha"

he teases me like that a lot, even kinda in a slightly mean way. Is it a good or a bad sign? Is he teasing me because he doesn't like me? Help?
Updates
+1 y
I forgot to meant to mention that I'm really skinny, so it was obvious that he was messing with me
If a guy is teasing you, is it a good sign or a bad one?
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