Congrats on your 20 days!
Being a loner isn't a bad thing. I have days/weeks when I want to be alone too, just to think things over. Perhaps you need time to get social again, perhaps alcohol made you too social, perhaps it's still a withdrawal symptom, the first few months are an emotional rollercoaster.
The only thing that matters is that you stay sober. If you want to do that alone, that's fine. If you need help on-line, SR is here for you.