Short answer
Emotional closeness can be rebuilt through respectful communication, quality time, appreciation, affection and resolving old disagreements instead of repeatedly reopening them.
Islamic Guidance
What Islam teaches
The Qur'an describes marriage through tranquility, affection and mercy. Kind treatment and good character are important foundations of married life.
Practical Guidance
What you can consider
Set aside regular private time, listen without immediately defending yourself, express appreciation, and discuss concerns before resentment becomes established.
Sources
Qur'an 30:21; Qur'an 4:19.