So frustrated, I feel like giving up. *Rant/Vent*

It was a five minute trailer ride from our property to the stable and he's very quiet in the trailer (no kicking or anything) so I'm not sure. I'll feel his legs and see if there is any warmth or anything weird feeling.

I have free lunged him and done ground work with him since I've brought him home, and he's moving fine and willing at all gaits.

I never said he kicked out.
Colic did go through my mind, but he was fine in his paddock (no rolling, kicking at belly). Just shoving hay in his face and napping like typical Arrow.

The rolling was probably due to the super fine dirt in the arena, since he isn't frequently ridden in an arena. I told the head groom there about it and she said that she's seen tons of horses do that their first time in the outdoor arena because of how fine the dirt is.

Selling a horse that rears will be a challenge. You'll have a tough time being picky about where he goes.

How long have you owned Arrow? Forgive me if you stated that already.

If I was to sell him, I would have a trainer work with him to stop the rearing first.
I know that selling him as he is acting now would be a death wish for him.

I have owned him since December 2011.

Everyones right horses don't change personalities over night and you need to face that fact that something happened to your horse while it was at that stable. If I were you I would be at the stable talking to the owner or manager and trying to find out what happen in the short time the horse was there. Asking questions like (did someone mess with my horse while I wasn't there? Or Did someone put tack on him that didn't fit him?) and also I agree with ruling out pain and calling the vet.

It was self care boarding, I was the only one who interacted with my horse. I provided all his feed, water, and care.
I was the only one who rode him.
I just seriously doubt that someone would go into my horses paddock and abuse him?

I disagree - horses personalities can change overnight.
Take them out of their usual environment and they can become very unsettled acting like nutters because they want to see all that is new around them.
Trista says that she is not overconfident so, when the horse started to misbehave she probably worried or tensed up and the horse sensing this, acted worse until he was completely taking the mickey.

I agree Trista that you need someone to come in and help you ride him through these problems and would suggest that when he is not being obedient with his manners that you get very cross with him. Not to beat him up or anything like that but to get hold of his halter, give him a few hard jerks with the rope, make him back up and chase him away from you in a circle on the rope. Generally make him think that you are the devil himself then stop and continue as if nothing has happened.

Take command in no uncertain manner.

Thank you. I'm going to ask around and see if there's any good trainers in the area.

I have been working his butt off since he's been home with groundwork, mainly backing up, responding to me sending him off and driving him out of my space, he's very disrespectful of personal space. I'm confident with him on the ground, just not in the saddle. :/

I actually purchased him to be my confidence builder, which was working until his sudden personality change