It was objectively wrong and an illogical decision, irrational. Blade was an absolutely ordinary colleague for you, you were connected by Elio's leadership and joint missions, if they happened to you in short periods of time. But you were a great team and were able to complement each other, as a result of which there were a lot more joint missions, as well as the time you spent together became comfortable and cozy. So much so that maybe at some point it crossed the line.
It was part of his mission, part of his job, and it was impossible to give up or get away from it. To see Blade with another woman... it was strange and caused unpleasant sensations in the lower abdomen and heaviness in the heart. You needed time to think about it all.
And you've been diligently trying to avoid Blade wherever you can. Even at headquarters.