You’re trying to force a plot or character shift with an unearned moment of mushiness, and that won’t work. The fun of reading a romantic scene is feeling the emotional threads that author has been weaving between two characters finally tighten with satisfying resonance. The story hits an emotional peak, and it’s oh so lovely. Ahhhh. Without those emotional threads, no peak. Just dialogue lacking emotional underpinning and awkward touching. Ick. You don’t want to write that, and I don’t want to read it. What relationship shift is true to your characters? Their internal arcs and relationship arc haven’t been about attaining rewards found in romantic love. What’s their emotional need? Is their forced team-up finally shifting to true friendship? Are they revealing vulnerabilities to establish true trust? Identify why the characters you’ve written must connect emotionally at this moment, then write that peak. You’ll enjoy that scene, as will we.