my girlfrnd should also contribute in making phone calls or not??

i m in relationship with my gf since 5 years bt from last 2 years we are nt living in the same city..now my gf wants me to call her everyday bt on my cost....she necer spends money to call me...she gives me miss calls until i call her back....but i think she should also sometymes call me from her own money...why should i call her evrytimes...coz she also loves me...if this continiues my planning to break-up;....