I have been married twice. The first was based on manipulation and deceit -- which, because of whatever blindness on my part (maybe unexamined passion), it took me years and years to recognize. That realization was deeply painful and disturbing: I sought counseling/therapy; and eventually ended the marriage (which action was met with great acrimony and the loss of not a few "friends" -- there were times when I could not rationally function).
My second marriage started with deep and growing friendship: we were friends -- and eventually best friends -- before any romantic intimacy. Our marriage has lasted 27 years, and now we grow old together, still as best friends.
I'm not holding that up as a model over the single life. We are all different. There are many socially-prominent and culturally-promulgated rules and notions that simply do not fit who I am. All I am trying to say is that -- even for an introvert like me -- Epicurus was, to my mind, right about friendship.