Every few months, they wake Bucky up for a week or two to try a new treatment. He and Steve always take the opportunity to spend time together.
They've always had a mutual attraction and acted on it from time to time to some, but never allowed themselves to have an actual serious relationship because period-typical attitudes about homosexuality. They always wanted things for and with each other that would be impossible.
But now, they reconnect, bit by bit, and realize this is what they both, mutually, want and need. And Steve will wait for Bucky, however long it takes for him to be cured.
Optional: -"I've done too many awful things in the last 70 years to feel shame about who I want to have sex with." -Steve and Bucky get married in Wakanda
Steve/Bucky, Steve waits (post-Civil War, slow-burn romance)
They've always had a mutual attraction and acted on it from time to time to some, but never allowed themselves to have an actual serious relationship because period-typical attitudes about homosexuality. They always wanted things for and with each other that would be impossible.
But now, they reconnect, bit by bit, and realize this is what they both, mutually, want and need. And Steve will wait for Bucky, however long it takes for him to be cured.
Optional:
-"I've done too many awful things in the last 70 years to feel shame about who I want to have sex with."
-Steve and Bucky get married in Wakanda