Maybe "safe" is over rated. I don't EVER remember feeling "safe". In fact, it seems like "feeling safe" means I'm missing something. (And I mean that in a "something's going to get you" kind of way.) But I don't know that you have to feel safe to have relationships. You might have to except a certain level of risk to have relationships. And I suppose not feeling safe effects the nature of relationships. (Supporters? Is that accurate?) Life without any risk seems like it might be kind of dull.
So, no partner, no family, but I have a few friends. Maybe not more than a couple close friends at the moment, but friends. I know them well enough that I know where I can trust them and what's beyond their ability. They don't have to be perfect. (Which is good, because I'm not.) Having someone disappoint you isn't necessarily a life threatening thing, it just can seem that way.
If you're looking for unconditional love, I'd go with a dog. I've got an English Bulldog who lives to make people laugh. He's great. His only potential ulterior motive is dog biscuits.
I guess I'm curious. What does "safe" mean to YOU?