salaams
i have not always been a good muslim throughout my teen years but i am now trying to change that seeing as i am getting older and time to settle down.
an old acquittance was talking to me recently about pretending to be husband and wife with others (males) and that in the sight of Allah that is haraam and it can be veiwed as you are really married.
is this true and how do you overcome this predicament as throughout the years my and a male friend used to often joke that you are my husband/wife and it is your job to such and such. for eg i used to say to him you should pay for lunch coz your the hubby and its your job to provide and he would say that you should clear the table because you are the woman and you have to clean etc
i have repented for my old sins but am not sure what to do and i am quite stuck. are there any hadeeth or ayahs regarding this?

Marriage is bond between a male and a female who are willing to help each other in life in sadness and in happiness together. Paper work is not needed.

Salaam.

And among His Signs is this that He created for you mates from among yourselves that ye may dwell in tranquillity with them and He has put love and mercy between your (hearts); verily in that are Signs for those who reflect. (30:21)