I'm so much better today. Not so much as a sigh. I think I got it out of my system.
I feel I should, though, make a clarification today.
That I'm sad and lonely doesn't mean I don't want people to ask me out if I'll be an odd one out. It doesn't disable me from conversation and company. It also doesn't mean that my friends can't talk about their boyfriends/girlfriends/husbands or treat me with kid gloves, as if I'd burst into flames.
Also, because this has confused people in the past, I have to try to explain: being sad that I'm lonely doesn't preclude me from being happy for others' happiness. It just reminds me that I'm sad, and sometimes, in the perfect storm of stress and emotions, the sad side of the scales tips and I have to be careful what I say or where I am. This is why sometimes, being by myself is best. This is rare, though. Most times I'm fine.
Thanks for everyone's kind words. I think I have to post stuff like that because when I'm in the middle of it, I don't feel like there's anyone I can talk to. I know that might not be true, but when I feel like I'm totally alone, a venting of stress on-line is very helpful. It makes me feel that someone is listening.