Talk to him about it. If he is serious about you, then he needs to decide whether he will try for you or keep the relationship he currently has. Either way, he needs to lose the obsession - nothing good comes out of them.
Block your comumcation with them
Only if shes obsessed with you !!
You shouldn't interfere with his relationship. Just wait and see how their relationship works out, if it doesn't go for it, but if it does, leave him alone! Don't be like the ladies off of Obsessed or Fatal Attraction for instance!
You should ask the guy about it before you do anything!
She Stole the Heart
A guy.
The guy
Either he wants to bring the relationship beyond the friendship level or he is obsessed with sex. Be careful, if you do strip for him then your relationship will change, not always for the better. A relationship based on sex is doomed to fail.
Wait for him.
become obsessed with him, that will turn him on
No. If she does then she's obsessed. If it's to that point then something is wrong in the relationship. She is intitled to think other boys are cute. Just make sure she doesn't start to go after them. Pay close attention to her and watch and if thers any changes :)
someone also obsessed with that person.