Trust issues are a moot point really.

They're a moot point because you don't actually need to trust anyone to get through life. I mean sure you'll have to trust people to some degree at one point or another, but it's never going to be the kind of thing where if they leave you hanging, you'll be completely screwed... unless you get into some or other very dangerous line of work or something to that extent.

Why are you in emotional purgatory? You don't "need" anyone else to feel good you know? I mean we all need some level of social interaction to keep us sane, but that need can easily be satisfied by taking a few strolls in the park and talking to random people. The more open you are, the more rewarding the conversations will be.

I really think you are just looking for a safe environment to "open up". Just a comfort zone where you can do the things you want, say the things you want and just be how you want to be. In reality you can do that anywhere, any time. You're just going to have to learn some moderation and some constraints, but that will come by itself once you take the edge off of everything you've got bottled up.

So practically, i think it would be good for you to detach from expected outcomes. That is, do try and interact as much as possible, just don't be outcome dependent. Also, whatever the outcome, it's not your fault. Sure maybe you really did screw up, but that's ok, seeing as how you are learning new things.

You know when you were a kid, and you were free to say and or/do anything without feeling any special way about it? Well you still have that power, but now you also have self reflection. Try turning off the self reflection until you've got your self reflection properly calibrated, because i don't think it is.