I understand the type of love we must be discussing to be in marriage or relationships.
We can, over many years, let several types of love blend into a general type of love where we care for others. It is easy to say we love someone and actually love them. Yes, we can actually rob ourselves of the love we know is out there and we need by loving someone. That is hard, but true. Sai mentioned being hurt over and over again: some people get hurt easier than others. Even then, it is unfair to allow someone else to hurt us over and over again. When we do, we may just wake up one day and find ourselves set aside from their lives. We may be abandoned. We may look back at all the years we might label as being wasted. We may feel foolish and stupid. However, we must have made a choice somewhere along the line to stay and be hurt. We possibly hurt them, also: whether knowingly or unknowingly, but they must have chosen somewhere along the line to love us.
I remember the feelings I got when I was first in love. They were wierd and turbid, yet a most wonderful feeling. I knew. It made me act differently, too. Being hurt over and over again reminds me of a tale I heard at church decades ago. After awhile, it reasons with our mind and shadows our judgment. We can become obtrusive, telling our own selves things we do not want to hear. Love makes us do things we normally would not do.
The story was about a mother and daughter, the latter of which kept hurting the mother over the years. Every time the mother was hurt, she would go behind the barn and nail a nail in the wall of the barn: hidden from others' view. Many nails were nailed next to each other. Every now and then, the daughter would do or say something that would ease the pain. The mother would remove a nail. The daughter found the spot many years later and asked her mother what is was. The mother told her what she had been doing with the nails. By this time, the nails had mostly been removed. The daughter asked about all the holes in the barn and what was going to become of them. The mother stated a nail could be removed, but the scars remained. The way I see it, anyone continually hurting another has either lost their true love to an extent, or has a problem they do not see. The infj rushes in to help.
We learn to live with mere human frailties and discern we are not perfect, living in an unperfected world. It is a fortunate person that finds true love and lives beyond the nails in the barn and holes they make. I wish true love for all, and understanding from your partners.