Nikko this is something that will take time just like I told Billie about losing her husband. I'm sure you have many emotions, love, hate, anger all rolled into one. It's very confusing I'm sure but you've done the right thing. You couldn't have gone on like you did. You need to take baby steps.
Yes, the holidays are hard for a lot of people. It's supposed to be a happy joyous time so why are so many people sad?