How does one avoid being the fallback guy (or girl)?

Anonymous
I think the part that hurts men the most about, "nice guys finish last" is the finishing last part. The feeling of being her fallback guy after all the jerks fucked and dumped her. So how does one avoid being someones last option?
How does one avoid being the fallback guy (or girl)??
How does one avoid being the fallback guy (or girl)?
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