how to sabotage rush?

im a freshman rushing mostly mid-tier houses but my girl best friend is probably gonna get into any c4 house. im worried once she's there she's gonna start seeing guys from the top houses and i won't have a chance to get with her anymore. is there any way i can make sure she doesnt get into c4?? pls help

TLDR: need to sabotage my friend's rush chances so i can still have a shot with her