Why do I always have life reflecting thoughts before sleeping?

That is because you are normal. There is nothing to worry about. In fact be happy that you still have that room for positivity in your life.

Personally, I have the same thoughts before I go to bed. I like to look at it this way; these thoughts can help me wake up better tomorrow with a sharper mindset and goals to achieve. I can use these life-reflecting thoughts to see what's truly important to me and which ones can stay on the back burner. These life reflecting thoughts can help me carefully think about the day and my life so I can sleep peacefully knowing that tomorrow brings new and more opportunities for success and growth. They can also help me think about my goals and what I want to do with my life.

This is completely normal! In order to sleep, you close your eyes and relax yourself. There's honestly nothing else to do, so you just start having some deep thoughts. If you want to sleep faster or get these thoughts out differently, I would suggest talking to someone you live with for five minutes every night before going to bed. It can just get out a lot of thoughts and make you sleepy. If you live alone or this doesn't seem like a good option, you can write in a journal every night before going to sleep to get these thoughts out of your head.