Ohio Mark is right... everyone backslides and it's okay. You can even have major backslides and a week later things are different. A few days often settles things down.
I wouldn't necessarily call what you did a "backslide." A near kiss is nothing and you shouldn't feel guilty about that. Although telling your husband may have positive and negative consequences. On one side he will realize you are attractive and he can lose you, on the other side he may use it to validate his own behavior (well, if she does that then I can kiss OW). In the future be more evasive. Don't give your husband any details.
As far as what this near-kiss means to you... I think you should see this as a lesson. It's an indicator of how vulnerable you are right now and how you will need to be very firm about boundries and seek healther ways to build up the ego. Flattery is nice, but don't take it seriously. You don't know the motives behind it. Usually it has nothing to do with you.
There is no arriving, ever. It is all a continual becoming.
