I think this happens in every new love. Because every love story is the same. Or all lives, all issues. We are more similar than we think, and we all experience the same events. When you enter a new relationship, the feeling of "I did it with him/her" can be uncomfortable, but it is normal. After all, life has not stopped, and it has a certain fluidity. Although events may seem similar, history never repeats itself. It is never the same. Might be the same note, but still a different show.
And I will tire my brain by reading your poems again and again and thinking about where you get these inspirations from, a nice tiredness.