I'm so sorry you are going through this. But it gets better, I promise.
We all have our own paths to follow, but just to give you a sense of what it will feel like for you someday: This morning, on my first BD anniversary, I saw my husband's apartment for the first time. My D wanted to show me something she was building when I came to pick her up. It was in his bedroom. So there I was, in his apartment, in his bedroom. I looked around a teeny bit, I admit. I saw a strip of those photo booth pics on his night stand-- I'm guessing from the recent wedding he went to, as similar pics were posted on line. It was too far away to see, but I'm also guessing it was him and an OW (b/c I think it was too small for a group shot, and besides it would be weird to put a group shot on your night table.)
Anyway, so there i am, BD day, his new BR, nightstand pics. A lot of stuff.
And I was a bit sad. And even teared up for a minute. And then I played soccer with my D on this gorgeous day, then we put on costumes and visited friends with spouses and babies and had a lovely fabulous day and barely thought of him at all.