My Deity of choice is Aphrodite, and as any follower of this lovely Goddess will tell you is that you should not mess with matters of the heart. I would recommend however that you ask for your sexual needs to be met, do not focus on one particular person, just ask her. I would also leave an offering such as roses, an apple (this is her fruit, a part of her mythos) or burn some rose scented incense. Remember to thank her as well, it's always important to be polite whilst conversing with the Divine. If you want more power cast a circle and then do this. I hope this helps.