There is a book, I’ve yet to complete it, called The Art of Falling in Love . I watched the author in a YouTube link and found his information really helpful.
My wife and I started a nightly exercise in which we ask each other questions that are bringing us closer and one of them is actually not a question telling each other something we appreciated about them. Something small like thanks for picking kids lunches or big is OK. It has really changed our perspective. Both of us were so focused on each other’s flaws (I cheated, she didn’t share any hobbies with the me... blah blah you name it) and honestly this mindset shift has made us both more attracted to each other.
Just sharing a few things working for us. May not be for you.
Sorry wrong title. This is the one. The Art of Falling in Love https://www.amazon.com/dp/1451672659/ref=cm_sw_r_other_apa_i_q3ogFb0W47HBV