Literally you could say no tengo novia, or you could say estoy soltera, which means I am single.
Mi Novia. ;)
Kiss your girlfriend would translate to 'un beso a su novia' in Spanish.
joven amiga- "girl friend" girlfriend"- novia
"Tienes una novia?"
hola novia
very easily
Puedo estar tu novia?
¿Tiene usted a una novia?
"Ella es mi novia."
Yo tengo una novia.
la bella novia
Girlfriend (as in couple) is "novia" pernounced: noh-via and girlfriend as in a girl as a friend is "amiga" pernounced: ah-me-gah