It is narrated from Sayyiduna Miqdam bin Ma'dikarib (may Allah be pleased with him), and he witnessed the time of the Prophet (peace and blessings of Allah be upon him), that the Prophet (peace and blessings of Allah be upon him) said: "When one of you loves his brother, he should inform him that he loves him."
Hadith Referenceالادب المفرد / كتاب / 542
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه أبوداؤد ، كتاب الأدب ، باب الرجل يحب الرجل على خير يراه : 5124 و الترمذي : 2392 و النسائي فى الكبرىٰ : 9963 - انظر الصحيحة : 2515»
It is narrated from Mujahid (may Allah have mercy on him), he says that one of the companions of the Prophet (peace be upon him) met me, so he held my shoulder from behind and said: I love you. I said: May the One for whose pleasure you have loved me, love you. He said: If the Messenger of Allah (peace be upon him) had not said: "When a person loves someone, he should inform him that he loves him," I would never have told you. Mujahid reported that then he offered me marriage and said: We have a slave woman, you should marry her, she has no brother or sister.
It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: "When two people love each other for the sake of Allah, then the better of them is the one who loves his companion more."
Hadith Referenceالادب المفرد / كتاب / 544
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه ابن وهب فى الجامع : 198 و الطيالسي: 2166 و ابن الجعد : 3191 و ابن حبان : 566 - انظر الصحيحة : 450»