I am having some boy problems and i need help now! I need advice from both Girls and Boys!?

You see i liked this boy and he had gotten my phone # (lets call him Jack). You see Jack has a GF and i don't like her very much.... Jack is a pervert and he likes me too, and he was saying somethings his GF wouldn't like him saying... and he told me not to tell anyone. But i kinda told my Best friend b/c i ALWAYS tell her everything. So she decides it is in her best interest to tell (lets call Jack's Gf Deb) Deb that we were fooling around. Now Jack never wants to talk to me again b/c i almost broke them up. I really just wanted to be only friends in the first plc (b/c i knew he was w/ Deb). I still want to be his friend but i dunno how to get him back! Please HELP ME!