For few matters you need to be solo, for some matters you need soul mate and for many matters you need society,
Never invest in any kind of relationship with anyone who is not willing to work on themselves just a little every day. A person who takes no interest in any form of self-improvement, personal development or spiritual growth will also not be inclined to make much of an effort building a truly meaningful connection with you. A relationship with only one partner willing to do the work ceases to be a relationship. And as anyone who has been there will tell you - it's pointless to try and dance the tango solo.
However, I must admit that keeping myself to myself has not always been comforting. At times, I seemed to suffer spells of depression and loneliness, longing to become healthy again; of going out and facing a world of injustices, of misery, of widespread indifference.