Sorry, I remember there was one that exactly what you want but I cannot remember the title.
Btw, it's BL, not sure if it's your cup of tea...
So, MC blindly one-sided loved this friend of him to the point of being a doormat.
Noted, these 2 never started any intimate relationship.
Finally one last thread snapped because of how ashole his crush it.
MC somehow started meeting with his crush's older brother (who actually have feeling for MC since long ago).
MC told him, he want to stop loving his crush.
And if the brother ok with it, they can start a situationship with the intend of forgetting the crush and intend to start serious courtship with this brother.
I only read up to the 3 meet up.
I remember wanting to pile chapters to binge read.
Sorry, can't remember the title... （/TДT)/
Is there romance stories where Mc has this unrequited love with someone and found someone else to remove their mind off them until they actually love them too?