>>11193
I'm assuming you mean the "obtain sex" part:
This is a version of what's in the Papyri Graecae Magicae. I can recommend the Betz edition. The weird words in bold are to be chanted, do your best to get the pronunciation right, for they are words transliterated many times over many millenia, originating in the antideluvian world and thus their sound is of great potency, for men were closer to the gods then.
After having purified yourself and the room in the proper manner (read: dust the room, shower, wear freshly washed clothes (preferably pure white), prayers of cleansing are optional but recommended)
On a Friday in the hour of mars, draw the woman on her knees, with Mars holding a sword to her throat on good quality paper or ideally papyrus (see-through printer paper does not cut it)
In a subsequent hour of mars of the same day, place 13 pins into the drawing of the woman, into genitals, breasts, the mouth, the heart, etc., with each insertion recite thusly:
Lord, daimon, attract, inflame, destroy, burn, cause her to swoon from love and inflame her with passion! Goad the tortured soul, the heart of [NAME], whom [MOTHERS NAME] bore, until she leaps forth and comes to [YOUR NAME] whom [YOUR MOTHERS NAME] bore, out of passion and love, in this very hour, immediately, immediately, quickly, quickly. Do not allow [NAME] to think of another, nor drink, nor food, but let her come melting for passion and love and intercourse, especially yearning for me in this very hour, immediately, immediately, quickly quickly.
Then proceed to bury the paper, in a place where nobody can see you and deep enough so it doesn't get dragged out by a dog or whatever, while reciting:
I entrust this binding spell to you, gods of the underworld, Pluton and Kore, Persephone, Ereschigal and Adonis and BARBARITHA and Hermes of the underworld and Thoth PHGKENSEPSEU EREKTATHOU MISONKTAIK and to mighty Anubis PSERIPHTHA who holds the keys to the Kingdom of Hades, to infernal gods, to men and women who have died untimely deaths, to youths and maidens, from year to year, month to month, day to day, hour to hour, night to night. I conjure all spirits in this place to stand as assistants to this spell! And arouse yourself for me and go to every place and into every quarter and to every house and bind [NAME], tho whom [MOTHERS NAME] gave birth, the daughter of [FATHERS NAME], in order that she may not be had in a promiscuous way, let her not be had by any but me, nor let her do anything for pleasure with another man, just with me alone!
Do not let her drink or eat, that she not show any affection, nor go out, nor find sleep without me, [YOUR NAME], to whom [YOUR MOTHERS NAME] gave birth.I conjure you, spirits of the dead, by the name that causes great fear and trembling, the name that whose sound the earth opens, the name at whose terrifying sound the spirits are terrified, the name at whose sound rivers and rocks burst asunder, I conjure you by BARBARATHAMCHELOUMBRA, BARUCH, by ADONAI and by ABRASAX, by IAO, PAKEPTOTH PAKEBRAOTH, SABARBAPHAEI and by MARMARAOUOTH and by MARMARACHTHA MAMAZAGAR.
Do not fail, but arouse yourself for me and go to every place, into every quarter, into every house and draw to me [NAME] until she no longer stands aloof from me for all the time of my life, filled with love for me, desiring me!
I have had great success with this rite, after a couple of years of daily practice. Depending on how good you are at cursing and with Saturnian/Martian energies, this may work for you with little to no training. Ensure you can find the buried paper again later, for if you burn it, the effect of the spell will dissipate slowly. If it works and you cannot find the paper anymore, you're in trouble.
Depending on how much she doesn't like the idea of fucking you, it may take a couple days/weeks. It may also fail, especially if you have never done any practice and aren't well-aligned with Saturn/Mars (At least you should've Saturn covered if you're here).
If it works, the side-effects on the target are going to be more severe the longer it takes. They may include: Schizophrenia induced by voices in her head telling her to fuck you, insomnia, loss of appetite, loss of will to live (if she really hates you), anxiety on being separated from you, etc. etc. You can figure it out from the text. If you are not able to find the paper again, you may have a yandere gf for live, however long that may last.
It may help to know that the ancient Greek s considered love a form of insanity.