Needs vs. Wants

Some people Say needs are different than wants.
I can't make up my mind.
They say "a need is something that you desire, and a want is something you want."
I think you can want something you desire.

Some people want something they love.
but you can need something you love, too.
I don't see much of a difference.
the only difference I see is in the spelling.

I do know, a need is something you need,
and a want is something you want.
But what i think is, you can need something you want
and you can want something you need.

I know, they sound like they mean the same thing, and you might be right.
so here is my question of the day:
What do you think of needs vs. wants? Do you think they mean the same thing, or something different? and why do you feel that way?