My lips look like they have exfoliative cheilitis but i think i got it from kissing a girl- can it be contagious?

Unlikely: Cheilitis can have infectious causes such as candida (usually at the corners) and strep, but candida usually affects those with compromised immune systems (such as people with diabetes, hiv, or taking chemotherapy), and strep usually is a secondary infection if there is broken or irritated skin. I believe that the chances of developing cheilitis from kissing is low.

Chelitis: Many conditions and factors can precipitate transient or chronic cheilitis, including overexposure to the sun, nutritional deficiencies, allergies, medications, dehydration, diet and certain systemic diseases. Transient cheilitis typically requires no medical intervention. Treatment for chronic cheilitis depends on the underlying cause.