Domestic partner(never married) for 8 years, do I have legal rights?

My partner and I have lived together for the past 8 years. When I first moved in he was just paying rent. After I moved in he was made an offer to buy the house. It is now paid for and he owns it. I have always paid for all the household items,(we did have a joint household bank account for a few years) and food for the family. I have taken care of him, the children and the home, ie...all cleaning, cooking, laundry,ect.(I am a private chef and massage therapist by trade) I've helped with remodels to the house and yard and helped with extensive yard work.(lots of labor!) I have raised my two children (my son was 12, and my daughter was 7) here for the past eight years,( my son moved out upon his high school graduation) and he had his twin boys move in with us (for the first time ever) and I cared for them for the two years that they lived with us (they were fifteen at the time). Before I moved in my partner owned nothing! Since I moved in he has been able to cash out this property (one acre)+ a three acre parcel on the other side of the island, a 2005 Honda civic, a 2007 Harley Davidson, a 2007 Kawasaki Ninja and is purchasing and having completely restored 1972 Mercedes. I have always worked. He has never "taken care" of me. I started a new career and put myself through two massage schools. I had to take out a student loan in 2003 for $14,000.00 and I am still paying this loan and currently owe $9800.00. What I need to know is, do I have any legal rights to this home or anything or do I have to leave this relationship with nothing. I would be leaving here in worse shape financially than when I entered into this relationship. All I have is a broken down 1984 Bronco. I have paid him approx.$300.00 a month for the privilege to use his car to drive to work and to go grocery shopping and doing chores for the home. Please advise me to what legal rights (if any) that I have. Looking forward to hearing from you soon,

[annjd]

Normally you need to have an agreement in writing that you also own part.

But sometimes you can make equitable arguments to a court that you contributed and help build and keep the property in good repair -- and that you deserve some kind of benefit from that.

Best to have a lawyer assist if you try that argument.