Most of us can relate you how you are feeling - we've been there. It's a tough time.
But "Letting Go" is kind of like having a tooth pulled. It hurts for a while, often intensely - you just can't wait to get to the dentist. Once it is extracted - you feel so relieved. But then - how many times does your tongue run itself over the spot where the tooth once was? Probably 100 times a day. Just because it is no longer throbbing - it still hurts at first. After a while the pain is not there but when you run your tongue over that space - you still notice it. It has left a gap and sometimes you see yourself missing it terribly. It's going to take a while to get past it - it takes time.
But should you have kept the tooth? No - because it was causing you so much pain. But it will take a while to get past it. You will "Let Go" and move on in time.