It's just not everlasting love... if that actually exists. The feeling is LOVE but it can very well die tomorrow or the week after or a few years later... I love him now, maybe I won't tomorrow...?
We can all feel love but regardless there is some pretty i loveed up people like the ones you mentioned above. Some have a tendency to destroy the object of their love... human behavior is just so broad.
Like a baby, or a new lover. I look at parents all proud saying they LOVE their baby, and then I look at parents who hate their kids and abuse them and make stupid decisions. Or lovers that change their mind a year later, or stay around only because they are insecure. They don't really love them.
Hypocrites. Odd examples in one paragraph, but you know what I'm saying.