OK, start by reading this thread fully:
The Poster Radman has written some truly excellent stuff on projecting sexuality and interacting. It will be one hell of a trawl through his postings but well worth it - he has distilled many of the various approaches into clear, concise and everyday-applicable language.
Lastly - neck, great! a perfect opportunity for gentle touching/stroking etc before moving-in closer for a kiss. And yes, go so far, pull back for a bit, resume and of course if she shows signs of pulling back/discomfort, stop! Resume later/another time if she gives you the green light again, so don’t make it a big issue or seem that bothered - You can expect to dance back and forth on this for a while maybe.