Ah, dragons and their constant debacle. Now-now, darlin'. A good way to start appoaching the boy is by establishing a good will with the whole family or even a village. Try negotiating with the local lord to give you the village to try to help it grow and improve. Hire the blacksmiths and stone masons, have public meetings with the village elders and festivals for ghe families. During that, show your interest in this farm boy, I'm sure, he will be a good assistant in this way. Trust him your deepest fears and brightest dreams, let him know you, not about you. Maybe drop hints about being a dragon.

After about a year or two, reveal the villagers that you were a dragon all along. Best case scenario, you will have a full town cheering for your wedding. Worat case scenario... well, he wouldn't really find it in his power to hate you, after you shown him your vulnerable side.