well, i shouldnt be one to answer this as i have been alone so long but it definately seems like there was something there to build on, it seems really weird that it suddenly went cold. i wouldnt end it without taking one more shot at it. he could be sitting back thinking the same thing you are wondring what is going on and why arent you texting him. so take a shot and drop him a line to see how his is doing. "long time, no talk, whats going on?" if he continues to blow you off, then i would let it go. take care.