I'm so sorry, Monique. I really do hear you on this. My girlfriend is currently out of the country for two weeks, taking a break to "figure out what she wants." As much as I'd like to think otherwise, I'm pretty sure that what she wants right now isn't a pregnant girlfriend, so I'm also preparing myself to be single and pregnant. It's hard- I know what you mean about feeling totally undateable. Though, my friends assure me that that's not the case, I can't really imagine ever starting another relationship.
As the PP said, I do think that building support networks amongst friends, family, new folks, whatever, is really important. I have a couple friends who are pregnant right now, and though they aren't the people to whom I'm closest, I'm trying to work on those relationships so that we can support each other in this process (and also have a play group set up in advance!).
And we're all here too, you know? MDC has been a safe space for me many times before, and I definitely wouldn't have managed what became a long, difficult and expensive ttc process without so many supportive mamas.
And you know what? When that baby gets here, you're not even going to REMEMBER how sad you're feeling right now. It's going to be a whole new kind of love, a whole new way of seeing the world. Don't worry about what you're feeling right now. It's all a process, and you have to feel every part of it. But where you are right now emotionally is in no way where you're going to be, you know?