In the comics, Bucky Barnes doesn't meet his end. His character has had many ups and downs but continues to be part of the story. There have been close calls, but he always manages to come out on top.
Maybe Sam had his own urgent matters to attend to and couldn't stay with Bucky. Or perhaps he thought Bucky would be better taken care of by the friend in that situation.
In certain comic arcs, Bucky Barnes takes on the mantle of Captain America. This occurs after specific events and developments that shape the storyline.
Well, it depends on the specific comic series and story arcs. In some cases, Bucky Barnes does become Captain America after certain events and circumstances unfold.
Bucky Barnes is indeed bisexual in specific comic iterations. It's a modern take that brings a fresh perspective to his character and reflects the growing acceptance and inclusion in the comic world.