It looks like you don't know for sure whether your relationship has what is called "Love", am I correct? If that is the case, you will need to do an experiment. Send your wife to her parents (if possible) for about a month. During that time, try to live a regular life -do cooking, cleaning, household chores, etc. by yourself, hand wash your wife's clothes even if they aren't so dirty .....Ok. Don't watch any porn or try to even think about having another girl....put yourself on "self- inflicted" test of a "simple life". Within this period, call her everyday ...tell her that you washed her clothes today....you cooked the food she often liked....keep washing her clothes and try to feel her "omnipresence" now. Question yourself: Am I still ok without her? If you have some sense of "missing" you are in love. Like poet Madhav Ghimire says, if both of you really enjoy having "Peanuts and Oranges" on sunny day while talking about the taste, or both of you like hiking/walking together and enjoy it, remember that you are in love. Otherwise you would not enjoy or even get along with. that euphoria thing is not real and rather a source of "evil" ...forget that ...