Am I annoying this guy I like?

[TryingToHelp♥]

So this summer I went camping with a bunch of friends and I met this really cute guy there. We instantly started flirting and admitted to the other's friends that we liked eachother..so we hung out the whole week and eventually held hands. It was REALLY obvious he liked me, and I really liked him. Then our camping trips ended and we went home..we talked for about a month after and now we haven't talked in a few months. I heard he still doesn't have a girlfriend, but when I texted him to hang out, he never replies. I keep messaging him (facebook, twitter, text) and he doesn't reply. I'm starting to feel like I annoy him, but we technically never "ended it". What should I do?
recently, his friend (who ive never met) asked me why we didnt date when we first met since he liked me a lot. i also went to his basketball game and we waved at eachother.