The next sentence of lifelong love is like a dream, which means that the content of this love makes him realize true love, so this love is equivalent to a lifetime.
Love refers to love, which is the expression of two people's love. Different times have different definitions. The modern definition is that two people form the most sincere admiration for each other in their own hearts based on certain conditions and the ideal of loving each other, and are eager for each other to become their lifelong partners.