How can I get back in my highschool even if the principal doesn't want me back? Sry its long but I'm desperate?

Ok, please most read it and try to give me the most detailed answers. I am 18, I'm smart, and very social but somehow cannot manage to stay out of trouble. Mostly little things, only a few big mistakes. Ok so I moved to my hometown for years ago this june, right after my first attempt at 9th grade, in which my HIGHEST grade was 2.74%... I know, bad, but after moving and now living with a new parent, new surrounding, a fresh start, my parents made me repeat 9th grade, and I started to do good. Very good. I thrived. First year I won a presidential award for academic excellence. Only 500 students in the entire us qualified for this award. I had also earned other awards that same year. Sophmore year same thing, tons of awards and really good, but the while time I was always in trouble, skipping classes, late all the time, and sorta had a problem talking back and arguing with teachers. Well near the end of that year I ended up in a group home for none months, my dad placed me there because we didn't get along, and after sweetening junior year I failed 3 classes and had many more attendance issues and rule violations. Since I repeated after my junior year I turned 18 and was forced to move out on my own. Now on my own I had many child and the only way to pay then was to work more... That interfered with school, I left school for 3 months this past fall while working, reentered school in january and after getting myself in somelegal trouble recently was out of school again for two weeks in february. I the went back again and after about a month was kicked out. I'll explain why later. But lets just say I've been kicked out many times and this last time was probably the 10th time I've been kicked out and then aloud back. I've had many chances. This last time I was kicked out for a reason I totally disagree with. I was attending both the highschool and part time at the alternate education center (aec) , one day the dean of students asked me to meet him the next day at 8 am, I explained that I had class at the aec everyday at that time and that I would not be able to make the meeting, he told me to be there anyways, I didn't go, I wouldn't skip a class and lose the credit to meet with him, see the credit at aec is based on attendance, the amount of time you spend there, which I disagree with by the way, should be based on work completed, but either way I refused to skip my class and was kicked out for not doing so to meet with him. I have now ben out of the school for almost a month. I am smart, and I work hard, if they let new back I know I could easily make up the work and catch up. But I have dirty of developed a bad relationship with the dean and principalover the years and they well no longer let me back, I was not expelled, they just told me if I came on the property the police liason would arrest me. I need to get back in... I have reached a point where the bs is over... I'm done getting in trouble, I'm fine causing crap, done with bad grades.... I want to go back and do good, but being that I have this bad relationship with the dean and principal, how can I ho about getting back in, is there a way I could legally force then to let me in, or somehow go around their authority? I'm desperate for answers, I NEED to get back in, please someone help me find a way to grrrrrrr back in, since I want expelled can they even kick me out by threatening arresting me, can I go to the school board our would they just take the side of the principal? anything will help place try to be descriptive. If you want anymore details, shoot me a text, I would love to chat with anyone who might be able to help, 651-216-3457, thanks so much, I appreciate any help, and please excise my terrible spelling and punctuation... I'm typing this off my phone so that is why.