(It's okay! Just grammar things. I grew up with an English major mother.)
Runaan inhaled sharply. He needed to get out of here. He snuck out of the ballroom and into the halls. He knew the time was ticking for his little brother. He got worse by the day. And Runaan was fearful he may loose him at some point. His breathing was shaky, unsteady. He couldn't get Evan out of his head. He groaned quietly, shutting his eyes for a moment and breathing. He needed to find his target and get out.