I don't get why she's having this discussion with Tanaka. She should be talking about this with Mizuno, the person whose decision it is whether to pursue Tanaka romantically or not. She's just asking to making things weird and awkward if she tries to convince Tanaka to suddenly withdraw after he already confessed. Mizuno's gotta say either "yeah, let's become a couple" or "I don't want to be a couple, I just want to be friends" and if so Tanaka's gotta decide if he can be just friends or not, and that's literally all that needs to happen. There is no value whatsoever in trying to force Tanaka's hand, it'll only make things worse, and nobody would ever think it's a good idea. But yeah, as others have said, it's forced drama.