Hi ATLandon,
I certainly understand the loneliness you are experiencing--it really is a difficult thing to deal with at first, so my thoughts are with you.
When my BPDw left, I was terribly lonely. The silence in my home was particularly rough on me. I do have pets, and they actually helped me a lot, but I found myself doing unusual things to battle the quiet... .things like having the TV or radio on at all times (even when I went to sleep), and leaving lights on in rooms around the house. My T really thought I was dealing with some mild form of PTSD (my mom had also died shortly before my BPDw left), so she assured me that these were relatively benign means of battling the anxiety.
I can be a hermit on occasion, but I knew this was not the time for indulging in that behavior. I made sure to get out of the house and see family and friends as much as I could--I know it's a common suggestion that everyone recommends, and I know it's hard to do, but it really did help me. Push yourself to do this, if only to help break up some of the monotony that goes with loneliness.
Ultimately, the thing that really helped me the most was time... .you aren't that far out, but you'll get there.