How can I fix my life when I have messed it up so solidly?

I know I want to go to school for and I have planned out a way to finish school in 2.5-3 years and I know what career I can follow afterwards which all together and even seperately is more then I had before. But I don’t know how I can come back from this past year:

So I went to University last year and in that year everything went down hill. First off I joined a club and found something I loved doing that makes me happy where I met my friends now who are the best I’ve ever had. I also met a guy lets call him Marv me and Marv became fast friends and I found I liked him in October: Problem 1. You see I had a boyfriend back home that I dated for two years but our relationship was severly flawed and I found I was unhappy in it: Problem 2. November came around and Marv has shown interest for awhile, he kisses me then does again and I kiss back we have sex, we start acting like boyfriend and girlfriend when together I was going to break up with my boyfriend when I went home for christmas. By Christmas I think I am in love with marv.: Problem 3. My Grandma went to hospital In December for a stroke which it wasn’t she has Brain, liver, and lung cancer: Problem 4. I break up with my boyfriend and before I went back to school he has a complete and utter pjychological break down due to stress he recovers. February came round and Marv has changed his mind about dating but says things won’t cahnge they did: Problem 5. April things with Marv end other then friendship: At this point this wasn’t a problem. April durring exams My other grandma actually has a stroke and dies in the hospital, my grandma with cancer dies the next day:Issue 1. I attended my grandmother’s funeral who died of a stroke but due to the fact I had to move from rez into a house and write my other two exams and finances I couldn’t go to the other one: issue 2. I wasn’t ready to take my exams apparently because I wrote 4 exams and failed two and failed two classes as well as failed a class the semester before no one told me I was on academic probabtion after the first semester I have a required withdrawl that I could appeal to but didn’t bother because It is now mid June and I still don’t have a job and can’t afford school: Issue 3 and Problem 6. June my current boyfriend also started to show interest and asked me out<3 I get a job at the end of the month. I get a better student job at teh end of July but couldn’t continue the job past August because I wasn’t a full time student in September. I go home in August to see my mom and one of my brothers whom I haven’t seen since my grandmother’s funeral then before that I saw my brother at christmas and both before I left to come to school in the first place. September comes and I go full time at my previous part time job and decide I am going to take a class as an undeclared; no one knows I was required to leave the university. I haven’t had the courage to call my other side of the family because I don’t know what to say to them about not being able to go to my grandmotehrs funeral and the guilt is eating at me not a day goes by that I don’t think about them: issue 4. The thought of me fucking up my life so bad and everything that has happened on top of guilt is causing me to slip into depression I just want to sleep and when I’m not sleeping I want to stay active with the only things that make me happy: my hoop hobby, my boyfriend, and friends that I’ve started to mess up at school again and the worst part is I know I understand this stuff and it is simple I just can’t focous on it because every time I do then I remember how proud my grandmothers were of me going to school and how much I’ve failed them