The scholars regard these words as words that are hinting at divorce. The ruling is that divorce does not take place unless that was his intention. If he did not intend to divorce her or he does not know what his intention was at the time when he spoke these words, then divorce does not take place.
Shaykh Ibn Baaz (may Allaah have mercy on him) was asked about a man who said to his wife, “I don’t want you” a number of times. He said: These words do not constitute divorce if that was not his intention. This is a hint but is not divorce. His wife is still his wife, and he does not have to do anything.
Fataawa al-Talaaq by Shaykh Ibn Baaz, p. 68.