While you should speak with a family law attorney to see if there are any grounds (e.g. "palimony") under which he might owe you compensation, be advised that you left yourself in a very vulnerable position. Generally, there are three ways that a significant other may owe you money or support, and/or that you may be entitled to a share of his assets:1) You are married, since a homemaking/primary child care spouse is entitled to spousal support or alimony--but you are not married, and the laws and legal principles giving support to spouses do not apply to non-spouses as a general matter, no matter how long you were together.2) If you were put on the title as joint owner of real estate or a bank account you'd be half owner of those things and entitled to half their value--but you were not put on the title or ownership of those things.3) If you had some written agreement or contract that in exchange for you paying to remodel the house or taking care of the children you would get certan things or payment or support--but you don't mention any such agreement. You chose to stay in a relationship and quit your job for 12 years with someone who would neither marry you nor put on the title of his house or on a joint bank account. You did not have to to do that: you could have refused to quit your job; you could have insisted he put on the title if you were going to stay home or that he marry you, etc. By not doing something like that, you gave up your ability to support yourself without any guarantees from him or any easily enforced rights. So while it is worth you speaking to a family law attorney, since *sometimes* a non-spouse in a long-term relationship can receive some assets or support, you do need to bear in mind that left yourself about as economically vulnerable as you could.