let's say you're living with your SO, just the two of you in an apartment. your SO gets a new job and you are planning to move closer to it. Your SO's friend (who you really like and get along with) is planning on moving to the same area.
Would you consider moving in with your SO's friend to get a bigger, nicer place and pay less than you are now?
Would you consider it moving a step backward in your relationship with your SO, from living alone to having an extra roommate?