How do I know if he is the right one for me?

Okay, Im gonna try and explain this the best I can so I can get someones outside opinion. When I was 13, I met my first love, he took my virginity, and we dated for almost two years, but he cheated A LOT, so it ended. I dated a few guys, in fact, I had just started dating a guy when I met Chirs, the reason Im writing all this right now. I broke up with that guy for Chris immediately, I just had a connection with him. I just really liked him for some reason right off the bat. It was fate we met we always said because I had just moved back in with my grandma, (Ive lived with her almost all my life) and he and his family had just recently moved a couple trailors down from another town. I was sitting at the end of my trailor with a friend playing my guitar the night they had been moving stuff into their trailor. It was just him (chirs), his younger bro james and his even younger sis emmy, plus his mom and gma. James had been at the end of his trailor messing around, when i called him over to me and kendra, which is how my connection with the family all started. I was just trying to welcome them to the trailor park. I remember regretting asking why it was just his mom and gma, because he informed me that his dad had died a few years earlier. Chris the oldest never knew his dad I later figured out but accepted jame and emmys dad as his own. (I put this in there because it has a little to do with how we fell in love) We both had hard childhoods and we both did not have contact with our fathers. Anyways, that same night, I walk to the end of the trailor park to bum a cigg off on my friend's sister, she was standing outside talking to our friend and Chris, which is how we first met, I bummed a cigg off him. I was just about to turn 15 and he was just 17. We hung out almost everyday after that day for about two weeks before we made it official. Fast forward 5 years, I just turned 20, I broke up with him a few months ago finally because of his drinking. I finally put my foot down, even though i feel like he is the love of my life. I know I would love to be with him for the rest of my life, just not the alcoholic he turned out to be. Alcohol has been the number one problem in our relationship. It has gotten him into a lot of trouble. The biggest of which him gettin busted twice within two weeks drinking and driving and goin to jail for 3 months for it, that was about half way through our relationship and i stuck by his side right through it and wrote him almost everyday. After all we were pretty serious, he had bought me a little promise ring for my 16th bday. I thought that he would learn his lesson in there. But not too long after, he fell back into his old ways. He never hit me or nothing when he drank, I would just have to babysit him and it gets old. That is the only negative in our relationshipt. There are so many positives though, for one, my grandparents raised me, they mean a lot to me, he was there for me when my grandpa died, and lived with me and my gma and payed for everything he could, mowed the yard, ect. he helped out a lot, she loved him which was important to me. He bought me school supplies and clothes and paid for feild trips through high school, got me a car, he really took care of us. What gets me though is that we were total opposites in some ways, like school, I was a honor student and he was a drop out from another town, he liked to drink and I only did from time to time, but even then, I loved him, I always have, and always will. Even after our break up, his WHOLE family still talks to me, and I still go to there family dinners and such even when he doesnt. My gma and his mom talk on a daily basis. His little sister emmy, jus turned 16, has been living with me and my gma for almost a year now. I know its weird. I have failed to mention how chris and I had to grow up too fast together, which is probably where this connection comes from. We had to act like parents to his brother and sister, i lived with him and his family since I was 16. So not only did I have to keep up with my grades in school to be an honor student, I also would come home to help the kids with homework, do laundry and cook dinner and do dishes. He and I would go buy christmas every year. Where was the mother? she is a great woman, but is like a child herself and I think scarred from the loss of her husband. But anywayz, me and chris took care of his gma and mine and his little bro and sis, we got together when i was going into highs school, he was there when i graduated. he taught me to drive, got me my first car, took me to my first job interview cuz i was soo nervous. idk, the point is that we have been through so much together, and I love and miss him so much, he just doesnt know, he cried when we first broke up and continually tried to get back with me, and I had every intention to when he eased on the drinking. but the thing is, he never did, i think it got worse, and he has stopped trying to get back with me...id