You can tell the difference between love and friendship by thinking about the amount of attention you give someone.
Studies suggest that the brain in this phase is much like a brain on drugs.
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So while that initial spark is important, you've gotta want to be more involved, too.
I love you means do you want some? "If someone is thinking about your every move, picking your words and actions apart, and persistently overanalyzing everything, this is not normal nor healthy.
Infatuation makes you forget you have a life.