“I love you like rlb” has become a well-known, accepted and valuable component of American vernacular. The meaning of the letters ‘rlb’ is unknown, but is uniformly considered to be a statement of a great romantic love, commitment and sacrifice. It is generally attributed as a saying which emerged among American troops during World War II. Returning soldiers brought the saying back to American soil with them.
Tony's daughter claims she loves him 3000. It's an emotional line used in Endgame, Tony Stark says it back when he dies and creates a hologram of himself.
I love you to the moon and back D.M you are the love of my life and i always want you to know that you are my universe it's self you spin round and round deep in my heart and soul i will and forever love you 1.4.16.