The Messenger of Allah salla Allahu alayhi wa sallam was telling his uncle Al Abaas the story of Mugheeth and Bareerah, he said: "O Abbas! Isn't it amazing how much Mugheeth loves Bareerah/Barirah and how much Bareerah hates? Mugheeth?"
Bareerah was a female slave and A'isha was interested in buying her. She was married to Mugheer, and Ai'sha freed her (they were married in slavery); a free woman cannot marry a slave man, so after she became free, she had the choice to keep this marriage or to ask for the dissolvent of the marriage. She said, "Alhamdulillah, I'm tired of this marriage, I'm going to get out." Mugheer loved her so much, sincerely and honestly. After she left him, he couldn't take it, so he went in public weeping, chasing her, asking her "Ya Bareera just look at me or talk to me." He went to sahaba and said, "Please talk to her for me (to Abu Bakr and Umar and at the end, even to the Prophet (salAllahu alayhi wassalam) to ask him to intercede. So Prophet (peace be upon him) (as the mercy for mankind) felt sorry for him, and he said he'd do it. When he went to Bareerah, she asked, "Are you commanding me or are you just interceding?" The Prophet said, "I'm interceding." She replied, "If this is the case, then I don't want him", and since all else failed, he spent his life chasing after her and crying for her.
What to gain from the hadith:
Excessive love sometimes causes the forgetfulness of shyness. Just like in his example, he could not hide his love for Bareerah, but the Prophet (peace be upon him) didn't chastise him for it (becuse it wasn't in his hands.) He wouldn't have been chastised for it unless he totally crossed the limits. Imam Ibn Hajr said that it is permissible if it's out of someone's hands.
In the story above, Mugeeth even went to the extent that he asked the Prophet to intercede for him. Mugheeth loved her so much that the Prophet didn't deny that love, and he didn't say, "You can't because she's not your wife anymore."
*Love is a secret and it's an amazing secret from Allah (Subhanaw wa Ta'Ala!)*
[Sahih Al Bukhari - Book 63 [of divorce] #206]