What would keep a woman from leaving an uncommitted boyfriend?

Even upon failure, she may not give up.
Even upon failure, she may not give up.
10 years she's been with me, with no ring and still hangs on. The majority of women I heard from on this site wouldn't tolerate any longer then a few years to be fully committed. I tried proposing last year, that failed. I'm just curious for women who hang on to their boyfriend, who may be indecisive, uncommitted or uncertain about marriage for long periods of time, what makes them stay around when they could leave the relationship at any time?
What would keep a woman from leaving an uncommitted boyfriend?
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