harvest moon HELP!!!

ok this post is for freya, im having trouble with my harvest moon ioH game. I have met all the requirements for marrying vaughn but every time i try propose the blue feather he rejects me. plz help me, i need it really bad ive wanted to marry vaughn ever since i got the game. i also cant find a way to trigger the 4th heart event in the forest. i have tried every thing!!!