I want anime that has a guy that's in love with a girl but she is too dense to notice or an anime with sexual harassment and comedy.I've already watched
special a
kaichou wa maid-sama
mitsu x mitsu drops

Love Hina would be a good one that is a bit of a combo of the two characteristics you are looking for. It is a comedy and a guy falls for a girl who is too dense to let him in. If I think of any others I will post back for you.