3. When my three-year-old sister called him ‘the best big brudder in the world.’

“Shortly after I started dating my now-fiancé, he and I took my then-3-year-old sister out for frozen yogurt for her birthday. He helped her eat hers since he didn’t want any and I was eating mine. Then he taught her to play Connect Four and let her do the 3-year-old thing where they make up their own rules so they win. At one point, she looked up at him over her shoulder and said, ‘you’re the best big brudder in the whole world.’ (She doesn’t have any other brothers, so he’s her first.) My heart melted and I became 100% certain that he was who I needed. To this day, if my sister is asked who her sisters are, he gets listed with the rest of us, usually before me. He’s definitely a keeper and I’m super grateful for him.”
—hippiehoppy69

4. When he saved some of his ice cream for me.

“I was eating some of my then-boyfriend’s (now-husband’s) ice cream while we were walking, after polishing off my smaller cup a block before, and gave it back to him. He said, ‘have more.’ ‘I don’t want to eat all your ice cream.’ He laughed and said, ‘I always get a large, so you can eat part of it.’ Then I realized all the things he had done in the time I had known him—small considerate things like that, and he never mentioned them or wanted thanks. That was his green flag.”
—zazzlekdazzle