Check out it out here or just look for the link in the L section. There's a difference between love and obsession.
People get confused.
The big difference is that an obsession isn't a person who you know like the back of your hand. USA When the relationship starts I feel nervous and get butterflies in my stomach. When I see that the guy wants me for me, and not a sexual relationship only, I know he's right, because I know he's only in love with me and not just any girl who comes along. I think I would know just from the uniqueness of my relationship with the other person. He would most definitely have to stand out from the crowd and we would be able to talk to each other.