I got a cold sore over 10 days ago. it seems healed but there is still is a scar that is peeling a bit. is it contagious at this stage? can i kiss?

Probably safe but...: Once skin is intact, you're probably no longer infectious. But in case of contact with especially high risk, especially a newborn baby, maybe wait a few more days: better safe than sorry! It may take a couple months for the affected area to look entirely normal. In future, you can have much faster healing or even prevent full outbreak with single dose valacyclovir 2 g at first sign.