7 year old son has obsession with girl in his class

[Guest guest]

My 7 yr old son, ocd/anxiety, pdd-nos, and sensory intergration disorder, has a

growing obsession with this girl in his 2nd grade class. He talks about her

constantly( wants to marry her,pretends she is there with him). I found out at

school he is " harassing " her as well.He sat on her and tried to kiss her at

lunch ( apparently she cried over this), he is always makingn drawings for her

and bothering her. I realize a part of this is being almost 8 but it really has

taken on a life of it's own and if he were older one would call it stalking. The

school doesnt' tell me alot of what is going on and I have no clue what he does

there. I don't know how to make him stop without hurting his feelings ( have

tried the " sometimes people feel differently " routine). It is getting out of

hand. Is this OCd related? This is the first time it has been directed towards a

real person.