From my perspective--kissing doesn't just need to be about mouth-to-mouth. If she likes closed-mouth start there, but try kissing her cheeks, her nose, her chin, her forehead,...then try other areas...gauge her reaction. Keep things moving.
And, stop TALKING so much about it! I would find that a big turn-off to have to TELL a man how to kiss. Experiment w/o words. Her reaction will tell you everything you need to know.
ANd, I disagree w MrBond about the lizard comment...laugh it off & say "I was going for something else, but okay...!"
Even if she LOVED your kisses in the past if things are amiss in your R then the kisses will be perceived differently too, so don't get discouraged.
Just my two cents!
M- 18 T-21 S-14,11 & 10 BD 6-18-2012 (OW-EA) H moved out 11-3-2012 10-5-13 Me- I want a divorce. I want to move on w my life. 11-25-13 Jointly filed.