This would be why I do not suggest obsession spells. Things can get rather messy. A much better way to approach seduction is to focus on giving the gift of yourself. Sounds a bit egotistical at first glance, but I find that the state of mind it puts you in is much better than trying to magickally love-bomb someone into letting you in their bed. Generally speaking, people like to have sex. If you can become the sexiest, most fun person to be around that you can be, you won’t need to do much else.
Also, no means no, even if you did a ritual. Consent people, it’s not hard.