Shein: 7a (maybe 8a), where it discusses the Sheva Brachos. On the words, “Re’im Ha’ahuvim”, Rashi translates that as “Re’im Ha’ohavim Zeh Es Zeh”. Please, tell me how I misunderstood that. I don’t claim to have perfect P’shat in everything, but this one seems pretty clear (to me, at least).
(By the way, it’s idiotic when people say that a wedding should be the “happiest day of their lives”. It shouldn’t be at all. The couple should love each other more and be happier and happier together constantly after their marriage. But this Rashi clearly states that it’s assumed that there are already feelings of love under the Chuppah.)