Obsession or Love?

How do I know, wheter it is love or an obsession?
(Erotomania or De-Clérambault-Syndrom) Obsession is a kind of passionable Mania. The criterion for "de Clérambault" was the unshakable faith, to be loved of the target person. That person lives mostly in a higher social environment.
"de Clérambault" divided the development into three stages. Advertised after a stage full of pride in the hope and optimism to the adored one, came the stage of grief, in the sense of disappointed love and then the stage of the grievance by the admirer trying to enforce his claims, sometimes in a dangerous manner. There is always in front of the imagination, to be loved by that other person. That person often feels they have been restricted in there life and has often even compassion. A "NO" from the adored one, will not be accepted. Some of them even interpret this refusal as a challenge, merely to give even more effort, into making their courtship hearder. Through phone calls, letters, gifts, visits, or even by monitoring and one steal he/she wants to win this love. The delusions usually refers more to an idealized romantic love and emotional connectedness, than on sexual attraction.
Only by absolute prohibition of contact and concomitant a therapy (often the cause are processed in a unprocessed grief for a loved one), can help. Because an obsession has definitely two victims.
I think with this description you can realise the difference between an Obsession and Love. While Obsession is usually an ordeal of suffering and pain; Love shows, joy, even if Love sometimes hurts, its still giving you the feeling of happiness, warmth, be at home, tenderness and physical demand.