A few tips to make your spouse happy:
Remember your spouse in your duaas (prayers). It will increase the love and protect it.
Look good and smell great for your spouse. IT keeps the LOVE!
Give each other gifts. You will love each other more. Prophet SAWS said gifts increase love.
Don’t put your friends above your spouse.
Leave the past. It brings nothing but pain and grief. Its not your business. The past is for Allah.