As nouns the difference between companion and girlfriend is that companion is a friend, acquaintance, or partner; someone with whom one spends time or keeps company while girlfriend is a female partner in a romantic relationship.
What does companion mean to a woman?
A ladys companion was a woman of genteel birth who lived with a woman of rank or wealth as retainer. A companion is not to be confused with ladys maid, a female personal attendant roughly equivalent to a gentlemans gentleman or valet.
What is a romantic companion?
You are companions because you spend your life together, go places together and help each other. You are romantic companions because the basis for all that is love and attraction. Partner is someone who you not only share your life with, but who you share everything with.