Can your runescape accoutn be keylogged over skype?

my "friends" are messaging me over Skype telling me that they got my ip address (which they sent to me) they are also telling me that it is possible for them to send me a key logger over skype even though i didn't download anything because they did not send me any files.they have said things like "tomorrow you won't have an account" and "tomorrow you will be muted" and things like that. my firewall is on and port forwaring is set up to the point were no programs are allowed to port forward. can someone please tell me if it is even remotely possible for them to keylog me. i need this information a soon as possible! thank you!