In the comics, Harley Quinn and Deadpool don't get together. Their universes and character arcs are distinct and don't intersect in that way. Each has their own adventures and relationships with other characters.
No, they don't. Harley Quinn and Deadpool have separate storylines and don't have a romantic relationship in the comics.
Harley Quinn and Deadpool don't end up together in the comics. They belong to different comic franchises and have no significant interaction or romantic entanglement.