Congrats on your three weeks! I'm glad you didn't bring that relationship with you into the new year, or I'm afraid it might have been a lot tougher.
If you haven't been to an AA meeting, I suggest you give it a try. It's a great way to make new friends who will support the new you. The program can help get you on solid ground with your sobriety so you never have to go back to the mess you just left behind.
I went to meetings every day for my first 90 days. It was great for getting me focused, as well as getting me out and about, meeting new people. I felt like I was doing something every single day to feed my recovery.
Glad to have you here!