There is a series of emotions in love. At first, you believe that the person in an angelic figure. Everything is fun, and new. The person you love is an unturned book, and each page appears more fascinating than the last. But then, reality sets in, and in day-to-day life, sometimes people get frustrated, they act out and treat each other wrongly. Then, it seems that the lover was deceptive, but in reality sometimes it is just "coming back to earth".
To have true love, like my grandparents had, I think means not to get bothered as much by life's problems (fights will happen occasionally) and to accept each others' faults.