Report back as soon as possible.
Things will get better, and as long as you relax and just let things happen naturally, you'll find that you're going to be able to handle things more effectively.
I think that you aren't a crazy person. You went through a lot, and it has sort of created a false , unneeded sense of security within you that makes you overthink things. But the ones who care won't betray you, and if you know how to treat people well ( which you definitely do
) things will work out well.
Don't worry
You weren't antagonistic at all.
Perhaps you could talk to your cousin in order to train you and help prepare you for work and everything else that comes after. But most of all, the less you worry about transitioning between different mental stages and just learn to grow into each situation, as well as slowly but surely strengthen your self-confidence and learn from every experience you go through, you'll be heading on the right track.
Best thing you should do right now is meet a lot of new people, as well as trust your cousin and let him teach you the lessons and skills he's gained from his experiences. It's bound to benefit you greatly and make things even better for you from here on out.
Good luck for your GED, and remember to do your best.
I have faith in ya!