The long-awaited musical, Love Quirks, has finally opened at the AMT theater after a dozen years of fits and starts, which included the now all too familiar pandemic pause. A kind of take on "Friends" for the twenty-first century, the two-act work is about four cohabiting thirty-somethings as they explore the rocky path of love and friendship. Love Quirks spins out as a pleasant romp through the modern mine-field of …