I just finished rereading 'P.S. I Love You' and honestly, the ending hits a bit differently each time. It's not a neat 'and they all lived happily ever after' because Holly's whole journey is about learning to live without Gerry. The ending is her, a year later, on a trip to Ireland he had planned. She scatters his final letter into the wind. It's quiet and bittersweet – she's not 'over it,' but she's moving forward. She even shares a brief, hopeful moment with a guy she meets, Daniel, which implies she might be ready to open her heart again. It felt real, not forced. The last line is something like, 'P.S. I will always love you,' which just wrecks me. It acknowledges the love stays even as life goes on.
Some people wanted a more romantic wrap-up with Daniel, but I think making that the focus would've betrayed the book's point. It's about Holly's relationship with herself and Gerry's memory, not about finding a new man to fix her. The closure comes from within, which is why the ending works for me.