One of the pivotal moments for me was on my wedding day. I didn’t receive any message from him—not even a simple acknowledgment. I had hoped to hear from him, and his silence cut deeply, making me realize how distant we had become.
One year, my father said he didn't think he could visit. I have his only grandkids. He's retired and rich. He has connections to get cheap travel. He takes multiple out-of-country trips a year (that I've never been on). There is literally no reasonable explanation why he can't visit in a year and plenty of typical reasons for him to do so. I haven't talked to him in more than 5 years.
My anger/sadness dulls with time, but never goes away. I constantly have to remind myself that the father I want doesn't exist and never did. It has gotten easier with time, but it's still a scar. Just like a real scar, it gets angry from time to time, but it's not as bad as when I first got it.
It's taught me a lot of lessons. It taught me not to be like him. My mom once asked my wife "where did he learn to play with the kids like that? His father never did that." When my wife told me that, I couldn't explain it, either. I just treat my kids like I wanted to be treated when I was a kid.
I've gone to therapy and it helps. Maybe I should go back. As my kids grow, I'm learning new ways in which he failed me and our family. I never knew what I was missing, but now that I have to provide that for my kids, I see what he did wrong. Every year it's something new. I imagine it'll be that way until I die.
So, I'm sorry, but I don't think it ever disappears (as you can tell by the energy I'm typing with). I think it fades. Take from it the lessons that you can. Don't let the pain be fruitless. Acknowledge it, use it as guidance, "I know what not to do."