That’s really sad about your bro, Brain.
Basically, he’s spent his whole life in search of his “lobster” (shameless “Friends” reference). Perhaps he never cared. My aunt is like that. She’s been widowed three times and has remarried each time. I’ve never thought she was really in love with each, just that they looked good on her arm and wore the right shoes.
Some people’s priorities are very, very screwed-up.