Do memories of your ex's fade over time?

It's just been 3.5 months after my breakup and although I miss him like crazy, I find that the memories of our time together are not front and center in my mind anymore. In fact, unless I actively focus on them, it feels a bit like they are fading :(

Is that the same for guys? Does time make you forget the details of the good times together until it's just like 'oh yeah I celebrated last Christmas with her' but you can't really remember what you talked about or what you really did? I guess on my part, I'm just sad thinking about how my ex is probably forgetting us too ..
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I mean more like the details of the memories - like what it was that you guys talked about, the jokes that you had together, the times you spent cuddling etc.
Do memories of your ex's fade over time?
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