I get that block too, Try going and doing noob stuff with some people. If theres some noob in the GE making a team for kq or kbd, just go with them for fun. if some people are doing clan wars, go with... just do anything noobs are doing and be friends with them, its fun
Maybe you're finally moving on from RuneScape? I know this used to happen to me, so I quit then came back about a year later and I found a new joy in it.