I completely understand! Remember that I posted this in the Café a few days ago?
So now, what we need to do is learn
how to protect ourselves in the future.
For me, personally, it's very simple. I just stay single

And I'm 110% fine with that. I'm an ace so being single is when I'm
most comfortable. And it feels the most natural for me too.
However, because you'd like to have an SO, you need to find a way to connect with a genuine person without having to have your defensive walls up really high to protect yourself. How that's done? Unfortunately, I have absolutely no idea.