Im in a long distance relationship and i need help!?

Im in a long distance relationship with my girlfriend, i live in England and she lives in Croatia, we have been together nearly 8 months, i see her every 2 months min. I have practically lost my social life because of because she always wants to talk over skype. Now i slowly feel that we are gaining this extra distance between us. Her family practically love me, they accepted me for who i am and they respect me for everything that do for their daughter. I am a university student, i Play football for two clubs, i manage to do all of my ignments for uni on time., and i work 35 hours + a week jst so i can have money to go and see her, but there is not much effort from her side. She says she loves me and everything and she really does but im not relly feelin it if you know what i mean, i want to spend as much time with her as possible but i also think i need my social life back. What should i do?