What were you scared of? You mentioned the possibility that she might not fancy you - does that scare you? I was wondering if, from this and some of your other posts, you have an extreme sensitivity to, and even fear of, rejection?
Don't get me wrong, nobody loves to feel rejected - but it's a simple statistical fact that most of us will be rejected by more OLDs than we gel with. Not even sure rejection is the word at this stage. A first date is just a meeting to see if there is any compatibility so you can both decide whether or not to pursue things.
It feels like you put a lot of pressure on yourself about your dates, overthink a lot about minor details (whether someone is drinking, whether you have swapped numbers etc).
Do you feel very anxious about being single? How long have you been? You mentioned your friends, who you sat have more romantic success - do you compare yourself to them a lot?
Sorry, that's about a million questions - you aren't obliged to answer all or any - but I do think there is a lot to unpick, and it may even be worth pausing dating, while you see what you can do to build up your resilience - have you ever had counselling for example, or would you consider it? I found it really helpful, and though still a little shy on first dates, don't feel anything like the paralysing nerves I used to. Basically, I now think (most of the time - of course I do have the odd wonble) that I am a nice, reasonably attractive, kind and funny woman, and if my dates don't agree then that's no real problem, because I know that I am fundamentally ok!
And that's the sort of emotional place you need to get to, really, to make OLD endurable. Otherwise, each time it doesn't work out, you'll feel terrible and it will get harder and harder.....
Please don't be offended by what I have said - it is meant with kindness because you seem genuinely distressed, from your posts!