Name something you lost or gave away that can never be replaced

I have been trying to think of something I have lost that can't be replaced and I have come up empty. I think because there is nothing physical that can not be replaced. So when I thought about non-tangible things that I have lost all I could come up with is friendships. From elementary right up to my junior year of high school I had a best friend. We hung out all the time, we knew everything about each other and were just really great friends. All this was thrown out the window over me dating a boy. It was stupid and it sucked, she was my best friend but she couldn't just be happy for me. Things ended and that friendship was lost. But when I look back on it, it was a special friendship. One that meant the world to me, one that I learned a lot from and one that helped mold me. I am still hurt when I think back on it, when I look at how different our lives have become. When I sit and wonder how she is. I can only ever pray that she is happy and that she gets everything she wants. I hate losing friendships, because they always mean something very special to me. Each and everyone. Since that friendship I have done my best to make every friendship I have last, sure they don't always, and i learn and grow from them. I guess friendships are the one things you can lose and never gain back because they are all unique.