Am I right to feel unprotected and vulnerable?

Boyfriend of over 7 years.
I think we are common law (under each other’s health insurance, filed taxes together.)
My name not on mortgage. Everything inside house (everything I own) insured under house (under boyfriend’s name).
After all this time, he still has is mother has the main beneficiary of all his life insurance/ investments/ everything.

If he dies, what happens to me? Do I lose everything? Or maybe I get stuck with a crippling mortgage that I alone cannot afford?

Looking for some enlightenment/ advice.

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