Bucky Barnes & Peter Quill
It helped that neither Peter or Kate wanted any kind of relationship so it was just good to have someone around that liked to do the same things and helped keep him from sinking really hard after Gamora died. Anytime he thought about it he just headed right back out to be self destructive.
"Not much of a wine guy. There isn't a lot of stuff in space that's similar weird as that seems but I'll be damned if every race doesn't have beer of some kind or another." It seemed to be the universal constant.
"Yeah, I guess she's good. I gave her my old room and helped her cart her stuff in."