Praise be to Allaah.
A divorce (talaaq) uttered at a time of anger where a man has reached the point where he is not aware of what he is saying and thus may be classified as (temporarily) insane, does not count as divorce. But if he was aware of what he was saying, then it does count as divorce, and because he has divorced her three times, he cannot remarry her unless some else has married and divorced her.
But if he is uncertain as to whether he spoke the words of divorce or not, then this does not count as divorce, because the basic principle is that she is his wife and is not divorced unless it is certain.
The simple fact that a husband and wife love one another does not mean that he can go back to her after they are divorced.
And Allaah knows best.
Sheikh Muhammed Salih Al-Munajjid