Starting to resent my toddler

And it's so sad. But he DOESN'T LISTEN. I am starting to loose it. I love him to death but I feel different about him since his sister came. I try to keep my cool and implement love and logic but I just have no patience for his behavior. He is almost three. He is incredibly smart and can be so sweet, but he just hasn't adjusted well to me splitting my attention. Part of the problem is we are stuck in the house b/c I'm trying to keep them healthy. They both had rsv already and the baby was in the hospital for 4 days. So we are all a little stir crazy. Any advice?