It could be a misinterpretation on my part, as often can happen when reading the written word rather than hearing something expressed in person, but something is coming across in your last post that belies your statement that you are "quite content." You sound a bit angry and fed up.
I don't think isolating is the way to go now, for you, but perhaps you need a new set of friends. People who are able to really be friends without serving their own interests first, and who act with maturity and compassion. Keep looking, good people are out there. And be sure to be kind to yourself.