He might not be the warmest person, he but surely cares about you, well sometimes... Since you're his fiancé after all. It's not that he's not good at showing affection, he simply hates it. And no, he is not a nice person to begin with. He was a Ski Athlete back in his teen age, but he decided to stop and focus on his future. He's a match with his hobbie — as cold as a snow.