Hmm, I wonder if you could leave instructions, kind of like a living will except in reverse, so to speak... e.g., "only unfreeze me if you know I'll be able to make good friends and will be happy". Perhaps with a bit more detail explaining what "good friends" and "being happy" means to you :-)
If I were in charge of defrosting people, I'd certainly respect their wishes to the best of my ability.
And, if your life does turn out to be miserable, you can, um, always commit suicide then... you don't have to commit passive suicide now just in case... :-)
But it certainly is a huge leap in the dark, isn't it? With most decisions, we have some idea of the possible outcomes and a sense of likelihoods...
Hmm, what about an outside view? That is, thinking about what it would be like for someone else. I'm a little too sleepy now to recall the exact reference, but there was something said here about how people make better estimates e.g. about how long a project will take if they think about how long similar projects have taken then how long they think this project will take. And, because you know about the present, let's make our thought experiment happen in the present.
So, what if a woman was frozen a hundred years ago, and woke up today? Would she be able to make any friends? Would anyone care about anything she cared about? Would anyone be interested in her?
Another thought that occurs to me is that making friends is a skill that can be learned like any other skill. Perhaps you haven't needed to be very skilled at making friends because you've grown up in this environment where friends have come to you fairly easily. So if you practice and become really good at that skill and have demonstrated to yourself that you can make friends easily in any situation, then you'd alleviate the worry that is causing you to feel conflicted about cryonics?
You have best friends now, how did you meet them? In the worst case scenario where people you currently know don't make it, do you doubt that you'll be able to quickly make new friends?
Suppose that there are hundreds of people who would want to be your best friend, and that you would genuinely be good friends with. Your problem is that you don't know who they are, or how to find them. Not to be too much of a technology optimist :-), but imagine if the super-Facebook-search engine of the future would be able to accurately put you in touch with those hundreds.
I can think of three possibilities...
If I'm in charge of unfreezing people, and I'm intelligent enough, it becomes a simple statistical analysis. I look at the totality of historical information available about the past life of frozen people: forum posts, blog postings, emails, youtube videos... and find out what correlates with the happiness or unhappiness of people who have been unfrozen. Then the decision depends what confidence level you're looking for: do you want to be unfrozen if there's a 80% chance that you'll be happy? 90%? 95%? 99%? 99.9%?
Two, I might not be intelligent enough, or there might not be enough data available, or we might not be finding useful statistical correlates. Then if your instructions are to not unfreeze you if we don't know, we don't unfreeze you.
Three, I might be incompetent or mistaken so that I unfreeze you even if there isn't any good evidence that you're going to be happy with your new situation.