The Perfect Date (Fear Street, No. 37) First edition

Perfect...perfectly evil.
Brady Karlin is getting on with his life. The memory of his girlfriend -- killed in a gruesome sledding accident last year -- is beginning to fade. Now he's met Rosha Nelson, the girl of his dreams. And he's never been happier.
Until Brady starts to see a strange figure -- with a terribly scarred face -- following him everywhere. Until the horrible accidents start happening -- every time Rosha's around.
Has dating Rosha made Brady's dreams come true? Or brought his worst nightmares back to life?