Go all in. See your crush with someone else, confess your feelings to them loudly and in front of their current partner, ugly cry when it goes badly. Leave telling them you’ll wait for them. Text the partner later to say “nothing personal, I’m the right person for Crush and we both know it”.
Let me think, is there anything else one could do to make it more desperate and toxic? Without crossing into actual criminal harassment and stalking of course.
Find a partner who looks similar to Crush, replace their wardrobe with virtually identical clothes to Crush, along with haircut, perfume, etc.
Constantly visit shops close to Crush’s house, so it’s “coincidence” when you bump into Crush and Partner.
From there, before they can talk their way out of an awkward situation, joke about how they look like twins, and that fantasy has always appealed to you.
