Dude, theyre kiddos and have the hormones going crazy
Thoru and Kobayashi have their own thing going on and we know for a fact that Kobayashi isnt the most sex crazed person out there and that Thoru wont do something Kobayashi doesnt want to, if all you want to see to believe its being taken seriously its both of them worrying over trivial stuff and having those kinds of insecurities now, then sorry to say but theyre a bit too old for that xd
Lol cope. Sexual tension and romantic tension doesn't mean hormones.
Take has shown an explicit physical interest in Iruru. There's like... no questioning it. Kobayashi has only shown an explicit sexual interest towards Tohru ONCE in the whole manga. It was the time the author genderbent her into a guy.
There's no romantic tension either. With Take and Iruru, you can see Iruru trying her best to not hurt Take. You can see Take literally go out of his way, to help Iruru out when she's in trouble.
Between Kobayashi and Tohru, Tohru's doing 100% of the work romantically. Kobayashi has shown no romantic asperations towards Tohru. She has shown familial ones tho.
I'm convinced that the only reason this is lesbian is cause Cool has no self-control and knows that if it were a straight couple he'd immediately make the manga lewd, so it's gay instead and he can keep it wholesome.