Theo forced himself not to cringe away from Charlie's outstretched arm because he was suddenly angry with himself for being such a coward about a simple thing like human touch. The thing that had haunted him and run him down in his dreams wasn't there (anymore), wasn't real (for all intents and purposes) and he could handle being touched by someone who was offering him help damnit! He wasn't touched and he cursed himself again for feeling relief.
Dominic again? Theo needed to have a sit down and a chat with that guy; he was sure he was some kind of genius and if he could figure out a way to stop Theo wandering off into other places at night Theo would owe him one. "He's a clever kid." Theo commented aloud, sincerely too. He managed to make it to the opened door when Charlie offered and as much as Theo was annoyed at himself for being so fragile - a display of weakness that his dad would have broken some bones for - he didn't want to refuse Charlie's openly offered kindness, or act as though he was worried about his weight tugging at Charlie who he knew had a bad leg.
His feet were still bleeding now and again and he knew walking across to the office was going to hurt. "Thank you." he accepted, gingerly moving forward but clearly unsure of what to do; no one had offered him help like this before.