Ex partner died, joint loan

Hi,

My ex-partner recently died and he took out a 2nd mortgage loan on his house to clear his debts but I signed too- the loan people said I needed to sign because I lived there but the house was not in both our names- his house. He said it would not affect me, they just needed to know who was living there. we split up nearly five years ago. I don't know where I stand with this, he had not been paying it and I'm afraid I may be in a serious amount of debt.

I need some advice about this.
Ali.