Any idea what they found annoying? Obviously they share fault in this sort of thing, but you only have control over your own actions.

Personally I stay clear of people that are too needy in an online friendship. I have a life and other commitments. I might go months without talking to an online friend, then talk to them every day while we play a new game together. Nothing personal, but unless romance is involved there is an unspoken rule that online friendships are super casual. Cross that line and you're bound to push people away.