There have always been affairs. I don't think there is less "true" love than there ever was personally. People used to get married WAY younger and most of them weren't in love. Heck, in the 40's and 50's hitting your wife was a normal thing so I don't think there was more true love.
I think the idea of love we are sold in movies, literature, and music are fantasy and we need to realize that and be rational with our expectations and be patient in our romantic endeavors. There is surely true love out there for those who are truly loving themselves. :)
I agree there is true love in for those who are truly loving themselves but only for a limited time. We all love our parents, friends and family. We cannot live without them . The person who leaves them will definitely feel a sense of loneliness in his heart. Because God created us together and wants us together. Coming to the point where you said hitting a wife in the 40s and 50s was a normal thing. It is still a normal thing lol. But what makes awkward is people hitting someone elses sister, daughter ( someone who is not this wife). All problems start from here. All monotheistic religions state the same thing. The reason why people are in chaos today in terms of relationship today is because of the same thing... True love is with your spouse not only bodily attachment but with emotional well being as well. I am not yet married yet but I think this is what life ethics are :)