I have lived with my partner for 20 years now and they have been diagnosed with and only have a few months left to live. We want to get married to finalise matters, but they have a lot of debt. I am concerned if we get married I will then be responsible for their debt.
I am sorry to hear your partner does not have more time for the two of you to spend together.
Unless their debts are in both your names, you will not be responsible for them just by getting married.
It becomes an estate issue, which means you may have access to some of their pensions or accounts, but you are not responsible for their debts.
I would suggest you consult a Solicitor as well.