I am a gemini too. And I have to say I agree with the sage advice you have recieved so far. First of all, LDR's are just plain tough,no matter what sun signs are involved. I am not the typical gemini in that I WANT things to last forever, and usually do take a man back when he flakes out on me (hurt the worst by Pisces and Libras!) and I must say: count the relationship experience for what it was, and read a valuable book called , He's Scared, She's Scared, about commitment phobias. It really made me see what I had been missing...but all the signs were there that my Libra (last relationship) was gonna run. Geminis may be flaky, ...but....anyone scared of commitment can be too. It can happen to anyone,anytime. Best of luck to you.
p.s. as a gemini, I REFUSE to date other geminis!