It means that one good action, doesn't make a person's whole personality good.
-I helped an old lady cross the street.
-That's great, but it doesn't make up for the fact that you burned down your house on purpose and almostshot your boyfriend. One bird doesn't make a spring.
-Okay Maria, you don't have to be a bitch about it.
(N.) Hands down the best tv show ever created in the face of God. Features the two most beautiful men on earth; Chad Michael Murray & James Lafferty. Overall, the reason to live.
Nikita: Man did you see how amazingly hotttt Lucas looked tonight?
This type of love does not seem to be mutual, and most people in a "loving couple" tend to discriminate against this, saying it is not a type of love at all. One-sided love commonly occurs when a relationship or marriage breaks, and one person moves on, while their spouse constantly thinks of them and attempts to win them back, often in vain.
See also: obsession
See also: infatuation
Consider: love triangle
John loves Jane. Jane loves John. Jane finds Jake. Jane now loves Jake. Jake loves Jane. John is sad, because he still loves Jane. John experiences one-sided love, even though Jane does not acknowledge that.