I don't belong here...

I met my fiancé in 7th grade. We have been friends since then and have been dating since sophomore year of high school. I am now 18 and he is 19. Tonight I was thinking how different my life would have been if I hadn't have met him. We have had many down and few ups it seems. Tonight I really got thinking and I wondered what my 16 year old self would think if I told her I would be engaged to a mentally and verbally abusive guy who dropped out of high school. Who sits at home all day playing his video games while I work 50+ hour work weeks to afford life. I even put off college. I regret moving out. I think I know now that this is not what I want. How do I go about telling him? I want to get my life back...
**Edit: yes I love him but I only get one life to live. What if I'm making the wrong choice?**