Tadano is so sweet. It's a shame his greatest weakness is his self hatred, but I get it, too. But...
This still just feels like a set-up for Komi to get ahead, in a way. Or, rather, have that push. Because Komi's best friend, hands down, is Tadano. Tadano also feels this way, so I feel he'll confide in her about the "confession" he received... which will be affirmed by Komi, because she also likes Manbagi as a friend, and push Komi to confess to Tadano so she doesn't "lose." Or something like that...
Fingers still crossed for the "they all win" route, but that won't happen and I doubt Komi will lose. Heck, most of the unimportant side characters probably assume she's dating Tadano already... Up until the Yandere kills them when they gossip about it, at least.