Depression vs. Obsessive Love

Please tell the difference between the two.
Don't fall into a victim of obsessive love.

Read the book "Obsessive Love" by Susan Forward.

Contact his parents, relatives and friends if he is diagnosed of depression. It is not your responsibility to accompany him even if he has the illness.

Do frequently check his email and notify authority if he has any suiside attampt in case he really has depression. If he does, ask a telephone number of his closest person whom can be contacted during emergency. That can test his sincerity.

This is as much as you can do.