Depressed some advice?

hi my gf recently is working in abroad, we been together for ten months and at the end of first week she was there we both were really missing each other (hard to Skype each other). we split up, i wanted to make it easier for her to be there and make sure she was happy, since then people keep telling me moving on quicker means you'll feel better, so a friend introduced me to a single friend of hers and half way through chat i kept picturing my ex, (were still friends, but still love her). even though were apart i kept feeling bad chatting to another girl. im confused and not sure what to do, i want to be together when she gets back, but cant keep being like this.