Action, reaction, motivation, emotion, all have to come from the characters. Writing a love scene requires the same elements from the writer as any other.
I find I use the Internet more and more. It's just an invaluable tool. I do most of my research on the Net now - and certainly do the bulk of my communicating through email.
Mary Stewart will always be my goddess. I can pick up one of her early books - one I've read a dozen times - and still slide right into the story.
For over a year I continued to submit mss, and have them rejected - the last few with rejection letters indicated the story was pretty good, but I was American.