any good mangas with the guy obsessed with the girl?

http://www.mangago.me/read-manga/haou_airen/
http://www.mangago.me/read-manga/black_bird/
http://www.mangago.me/read-manga/watashi_no_megane_kun/
http://www.mangago.me/read-manga/aishite_kudasai_sensei/
http://www.mangago.me/read-manga/kisshug/
http://www.mangago.me/read-manga/love_celeb/

http://www.mangago.me/read-manga/haou_airen/ --- Best obsessive love story with Chinese yakuza
http://www.mangago.me/read-manga/kaikan_phrase/ --- Best boyfriend in manga world, like ever <3
http://www.mangago.me/read-manga/akuma_na_eros/
http://www.mangago.me/read-manga/desire_climax/
http://www.mangago.me/read-manga/honey_x_honey_drops/ --- love this one
http://www.mangago.me/read-manga/lovenista/ --- Not obsessive but yah..