It is a short relationship and the law and courts would basically allow you each to leave with what you put into the relationship.
You are entitled to the deposit you have paid and any other money for example payments towards the mortgage.
If he refuses then you can consider having the matter go to court and ask that the house be sold and you get your money back.
A family law solicitor should be able to assist you with this.
Being a short relationship this is all you can get.
If he refuses to give you anything you have to sue.
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