English version

steady boyfriend/girlfriend

From Longman Dictionary of Contemporary Englishsteady boyfriend/girlfriendsteady boyfriend/girlfriendGIRLFRIEND/BOYFRIENDsomeone that you have been having a romantic relationship with for a long time steady
Examples from the Corpus
steady boyfriend/girlfriendIn any case, life was much too enjoyable to think about steady boyfriends.It would have to be with a steady boyfriend.Then, he started getting interested in banger-racing and got a steady girlfriend.Now at 16 Steven has a steady girlfriend of 15, who he has been going out with for several months.The first year at university I had a very steady boyfriend who was doing a similar course as me but mechanical engineering.
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