From my own experience, and in observing friend’s relationships, I’ve noticed that when both parties have lots of options regarding “significant others,” there seems to be less drama in a breakup, than when one or both might be considered to be in the “desperate” category.
My wife and I met in high school, dated, went to college, broke up, dated other amazing people, and, in the end, found that what we had in the beginning was, in fact, the “real thing.” 30 years of marriage later, it still is.
I asked my wife to read this thread, and she said that, in her opinion, but not to be construed as advice, you’d probably be doing your “significant other” a favor to break up with her–but don’t be surprised if she finds someone better.