Remember that you will be rewarded by Allah for any emotions you show to your spouse as the Prophet SAW said: "One would be rewarded for anything that he does seeking the pleasure of Allah even the food that he puts in the mouth of his wife."
Never underestimate the importance of seemingly little things as putting food in your wife’s mouth, opening the cars door for her, etc. Remember that the Prophet SAW used to extend his knee to his wife to assist her up to ride the camel. Try to always find some time for both of you to pray together. Strengthening the bond between you and Allah is the best guarantee that your own marital bond would always remain strong. Having peace with Allah will always result in having more peace at home.
Remember that the Prophet SAW gave glad tidings for those couples who wake up at night to pray together. The Prophet SAW even urged the spouse who rises up first to wake the other spouse up even by sprinkling cold water on his/her face. Always try your best to be good to your wife by words and by deeds. Talk to her, smile to her, seek her advice, ask for her opinion, spend quality time with her and always remember that the Prophet SAW said: "The best of you are those who are best to their wives."
Love should never end and we do believe there is life after death where those who did righteousness in this world will be joined by their spouses (Surah Al Zukhruf 43:70) and offspring’s. The best example in this regard is the Prophet SAW whose love for Khadija RA, his wife of 25 years extended to include all those she loved and continued even after her death. It was many years after her death and he never forgot her and whenever a goat was slaughtered in his house he would send portions of it to Khadija RA's family and friends.