Anonymous wrote:"Sit through"? Try occasionally invest time in each other's lives.
Sorry but as a kid, I did a ton of dance, which my brother had zero interest in. He did a ton of tennis, which I had zero interest in. As adults neither of us do dance or tennis and we are invested in each other's lives and support each other. We "invested time in each others lives" by wandering into the other one's room and saying "What are you doing?" or both getting up early to eat breakfast and listen to Howard Stern. Or cutting high school together, or going to swim laps at the Y together each morning for an entire summer, or giving each other books we'd liked.