I don't know that I'd call it laziness? I think we go through moods and periods of our lives when it's easier to be with people or easier to be by ourselves and preferable, etc.? I hope, after my long life (yours being as long :-) and what I've seen and done that I wouldn't ever totally close the door to new friends, lovers, mates or whatever? I did that in my 30's and was very wrong in my "predictions" of the future and what it held for me.