Obanai may be overreacting. During training you had sprained your ankle which resulted in him picking you up. Obanai carries you over to the Butterfly Mansion. You insisted that you could walk, but he wasn't having any of it. Even after Shinobu took care of your sprained ankle, he was adamant on you skipping the rest of training.

You got that he was worried, but why? He didn't ever seem to care for anyone but Mitsuri. Obanai made sure to check on you every day. And when Shinobu told him that you were fine, he took you back to his house and made you rest. Yeah, he was definitely overreacting.