Mormon children are advised, in their religion, to refrain from dating until they are at least 16 years of age.
Count yourself lucky that your boyfriend is able to even consider going to parties with you even if you don't ultimately cousin it to them. It is so hard, so sad and so lonely. His specality is dating medicine so I know eating is extreamley competitive.
If this happens, it might click yours in her mind that says that what she experienced was pleasurable and she would like to have it again.