[TOMT][Movie][2010s] A guy who was supposed to get married but runs into his ex while playing golf. The girl is super rich, and the guy didn’t realize she was his high school ex because she had become very wealthy

I’m trying to find an American indie rom-com about a guy who was supposed to get married but runs into his ex while playing golf. The girl is super rich, and the guy didn’t realize she was his high school ex because she had become very wealthy. The girl choses to let go of the guy because the guy's fiancee became pregnant.