45? You're a young spring chicken! (Kind of) 😉
The things that happen in our lives all teach us things, support who we are and who we will become, even lost relationships or situations; they help shape us. I like that point you made about one thing (that may have ended) leading to another that could equally valuable or be even better. Life rolls on until we die, it's best to move with it right?
Now Mr. Soon to be 45 year old...I hope you have a great day on your 45th and trust me, you're unlikely to feel all that different. 🙄