Hasn't specified threat, "things won't end well" could mean breaking up. It doesn't necessarily mean physical abuse.

Also, this doesn't show what you've said to him, so we have no way of knowing what he's reacting to. Could be a pattern on your side, his reaction could be, while generated in anger, somewhat appropriate.

The way you answer him, with emojis and "okay"s, also doesn't indicate willingness to communicate, and communication is what he seems to be frustrated about, as he mentions sarcasm and attitude.

There's no way of really establishing any harmful intent on his part, and we don't know what has been said to obtain this reaction.

No way of knowing, without added context, if this is abusive or not.