Ace could compliment Cora's art, help her with car trouble, or be the other person for two-person tasks but he couldn't do more than that for her. She didn't want more than that anyway so there wasn't a problem here.
Drew didn't understand. Love saved him. Of course that was what he would want for his only brother.
Love would hinder Ace more than it could ever help him. It would get in the way of both of their dreams and wouldn't amount to anything since Cora was genuinely afraid of soulmates.
What would be the point of falling for someone who would never love him back? Why set himself up for that sort of disappointment? Hadn't he been disappointed enough in life already? The last thing he needed was more!
He wasn't equipped to deal with any more people's problems. She clearly had a lot.