Do you miss someone on similar worlds?

Is there anyone you have met on similar worlds that you enjoyed talking to but is either almost never on or is no longer a member of similar worlds. For me that person is SilentPartner we had really good conversations but he only seems to be on for one or two days with long stretches of time in between and he even gave me his Kik username wich apparently he also is never on, do you have anyone like that?