How do I write a decent love scene? Advice needed?

Stay away from clichéd phrases and flowery euphemisms for body parts. Ground it in details of how it feels, smells, sounds & what it means emotionally from the nervous girl's point of view. And maybe drink a glass of wine while you're writing it to loosen you up -- if it turns you on it should work for other people reading your story.

Write from yourself and your experiences. Use your knowledge of how it feels to have a warm hand touch your cheek, or soft lips slowly close down on yours. You have to really be imaginative.