Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
How much is the going rent for a property such as this in your area?
My apologies for the delay - and what I means what would the going rent for a house like that
Does she accept that the £3000 needs to be repaid in any event
I am afraid that since you are not married and since the amount you are paying her is intact under half what the rental on a similar property would be then you are not at present acquiring and rights in the property.
Clearly you are entitled to the return of the money that you lent her - and the items that you purchased belong to you.
If you have done any structural improvements to the property then you may have a small claim on any proceeds of sale - but sadly you do not in fact have any right to remain in the property so long as she gives you "reasonable written notice to leave."
I am sorry not to give you better news - if you need any further details then please ask