Go to a party with your friends, and instantly fall in love with the daughter of your father’s enemy. Sneak up to her window that night and flirt heavily, winning her heart.
At this point I highly recommend secretly marrying her, but be cautious that the enmity between the two families may cause you to get your friend killed, leading you to kill your now-cousin due to the afore-mentioned wedding.
At this point it can get pretty crazy… but the girl you were pining for? Her name never comes up again.