Walkon...
I'm so sorry you are going thru this. I thought I'd reply to you as I know how hard the long distance part of a relationship is...I've just broken up with my LD bf. I also know how hard it is going from talking everyday online or the phone, then nothing...it breaks your heart, and you feel so lost.
BUT - my advice to you (and I wish I had taken my own), please try and refrain from contacting him - at least until you visit on work where he is living. I know that you have not officially broken up yet - but give him time to miss you and think. He doesn't need to constant reminder that you love him - he knows, and if he is good enough for you, he will make the right decision.
How do people deal with this?....... its hard -really hard, this is your first big relationship yeah? You are probably thinking that you wont get thru it - but you will. I'm late 20s - and have been there, gotten thru it. Time and lots of support from people who love you will get you thru.