Okay this is a little sad but I like the idea of it. Imagine Bucky being absolutely terrified that you'll suddenly realize what kind of person he is and leave him. So one day you walk in on his sobbing quietly into his own hands after a mission where he had to kill a man because he's so upset with himself and you just sit in his lap for a good hour just quietly letting him whimper into your shoulder while you run your finger through his hair and assure him that you're never gonna let him go.
oh god my heart jesus
and he’d probably be saying “I’m sorry” over and over