When Steve was unpopular and rejected by society, Bucky was there telling him he had nothing to prove. It's canon. When Steve went all alone to the HYDRA base to rescue Bucky, he was willing to die alone in the fire so that Bucky could be safe. It's canon-

- as it's canon that Bucky didn't want to leave him, ready to die with him. When Sarah died, Bucky told Steve he could live at his home, with his family, his parents of course must have known he was going to invite Steve: the Barnes were Steve's family too, they were at-

- Sarah's funeral, Bucky told Steve "I'm with you to the end of the line" and he meant it, he proved it later. What we saw in CATFA and in the CATWS' flashback is consistent with Steve and Bucky being described as inseparable since childhood. It's canon. When Steve-

- said that even when he had nothing he had Bucky we could see and understand why he said so. When Steve was willing to die at the WS's hands, when he dropped the shield and told Bucky the very hearthbreaking line Bucky had told Steve years ago, it was consistent with it-

- all. They really were together for years, when Steve was sick and after he got the serum, during the Great Depression and when Sarah died, during the war on the European battlefields. When Steve saw Bucky turned into the WS he wanted to save him at all cost. It was really-

- for better or for worse, in sickness and in health. It's canon, it was shown and said and it was so deep and heartbreaking and this is why I won't validate that EG garbage and all the bs about them happy to part their ways for a missed dance with a woman Steve never dated.