You say, "He has kissed me a few times, but has always been very respectful."

How about, when there's a kiss, putting your arms around him (if they're not already there) and giving a squeeze, but then not dropping your arms but holding them around him (so he can't very well back away), pull back your head and look him in the eyes, then zeroing in for another kiss? (Repeat ad libitum)

Variation: A quick kiss on the tip of the nose, and/or on each eye. Then back to the mouth.

If you can't use the above as a successful beginning framework, there's nothing much that can be done for you!

Dave Oesterreich