All praise be to Allah the Almighty. Non has the right to be worshiped except Allah alone, and peace be upon his Prophet Mohammad (S.A.W.), his family, wives, relatives and companions.
Prophet Mohammad (S.A.W.) is the greatest benefactor of humanity and a source of guidance for all mankind. Undoubtedly, sending of the Prophet Mohammad (S.A.W.) is the biggest blessing of Allah bestowed upon man. It was Prophet Mohammad (S.A.W.) who bring people from darkness to light through his teaching.
The best way to express love for the Prophet Mohammad (S.A.W.) is to send peace and blessings upon him. Loving him, follow/obey him and sending peace & blessing upon him is an essential part of faith (iman) of every Muslim.
Allah says in the Al-Quran:
“Indeed, Allah confers blessing upon the Prophet, and His angels [ask Him to do so]. O you who have believed, ask [ Allah to confer] blessing upon him and ask [ Allah to grant him] peace.” (Surah Al-Ahzab: 33:56)
“Whatever the Messenger has given you – take; and what he has forbidden you – refrain from. And fear Allah; indeed, Allah is severe in penalty.” (Surah Al-Hashr: 59:7)
Narrated by Abu Hurairah (R.A.) that the Messenger of Allah (S.A.W.) said,
” Whoever obeys me, obeys Allah, and whoever disobeys me, disobeys Allah, and whoever obeys the ruler I appoint, obeys me, and whoever disobeys him, disobeys me.” (Sahih al-Bukhari 7137)