Oh, Karen, the unfairness of losing them both is incomprehensible. I'm so, so sorry.
Gaining more empathy as mentioned by Gwenivere can only be a good thing, and greater self-reliance per kayc—I thought of myself as so very independent before Brit died and now I know exactly how much he did for me. Both of us had jobs that required us to be relatively social, yet both of us considered ourselves loners by nature. It turns out being a loner isn't the same as taking care of yourself, and I'm doing a pretty bad job of it right now.
Also before Brit, I had been in a series of more or less serious relationships, but never anything that, deep down, I really expected to "stick"—I never wanted kids and assumed that if I just went from relationship to relationship until I was too old to, that would be fine. Brit showed me that true love is what matters and means most, not career.
Which is why, as all of you are suggesting in one way or another, life now feels meaningless—I wake up, I complete the daily routine, I go to bed, repeat, with no idea why I'm bothering. As you said, Gwenivere, there's nothing promising or rewarding about it.
Did any of you ever try to seek a life companion again, or did it feel pointless compared to having found your soulmate, or maybe like a betrayal of them? Please don't feel you have to answer this if it's too private, or maybe there's an already existing thread I should read that delves into this subject...