Did I break them up?

ok I added my friend's b.f on myspace ok and we got to talking. and then I said sumthing like your hott too bad your single. and then like today he told me he was single that my friend has broken up wit him. was it my fault. me and him never flirted...

though all I did was make that one comment and he told her but then she told me and laughed about it.

This is a little confusing? you mean "you're hot too bad you're NOT single?"
No it wasnt your fault they broke up, first of all one comment is a stupid reason for people to break up, and secondly your friend wasnt angry at you so I doubt that's why she broke up with him...