What's the Name of That Book??? discussion

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If We Could Go Back
SOLVED: Adult Fiction
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SOLVED. M/M Straight guy that starts dating another man. [s]
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I was wondering if anybody knows the title to a book that goes like this… They meet on a train on their way to work. He’s straight and married, he finds the guy that rides the train with him very attractive and interesting. Then they end up hanging out and start a secret relationship. Also the guy moves next door to him and his family, they all become “friends” but he’s still secretly I love with the other guy who I also think is married…
Can’t remember any more, if anyone has any idea whats the name of this book please let me know! ✨😬🙌🏼
Thanks u so much!