FWIW, I married my best friend. Twice. The first one thought she was bi, but after marrying me, realized she was actually gay. (We didn’t have sex before we got married. “Looking back,” she said, “I realize that was a mistake.”)
The second time was also my best friend. She gave me advice on how to ask out this woman I liked. (It was her — she figured that out half way through me explaining what I wanted to do.) We’ve been married almost 23 years and she is STILL my best friend and partner. Oh, and we got invited to my ex-wife’s wedding three years ago — her wife is wonderful.