Unless I've totally misread your post it sounds as if you're trying to change someone's sexual orientation to suit your desires. In other words, you're hoping to force someone to do something against his nature. Within The Satanic Bible
you will find this "rule":
Magic is like nature itself, and success in magic requires working in harmony with nature, not against it.
In The Satanic Witch
there is a section that warns of "The Folly in Trying to Charm a Self-Aware Homosexual". Of course, that scenario is different from yours, but the dynamic is the same -- attempting to seduce someone into changing their sexual preference. There is a lust ritual in TSB that you can try, but it will be doomed to fail unless your target has a predisposition to desire you.
or a good way to summon dantalion to help me
Dantalion? It sounds very much as if you are regarding Dantalion as a real being. Satanists do not believe in "demoms" as real entities, only as symbols or archetypes. I know there is a list of Infernal Names in TSB, but don't take them too literally!
"The difference between the man or woman who's a practicing Satanist, from an identity Satanist is that the practicing Satanist looks at the picture, while the identity Satanist studies the frame."
-- Anton Szandor LaVey
"Anyone without a sense of humor is too pretentious to be a good magician."
-- Anton Szandor LaVeyLife EverlastingWorld Without End