My DP and I are unmarried, together several decades with DC. We own house outright, but I own very small share as bulk of house was bought with partners' inheritance 20 years ago. DP always agreed I could have half of profit if/when house was sold as we have both equally paid for maintenance, infrastructure jobs and upkeep over the years. Infact the original Declaration of Trust, drawn up with both our shares when we bought the house, states that we would equally pay for upkeep I'm now wanting to formalise the agreement that DP would give me half share of house profit, if sold, by getting a further Declaration of Trust drawn up stating this. However, DP is now reluctant and unhappy to sign this. What can I do if he refuses? Some big and urgent house projects are coming up and i'm reluctant to put up half money if i'm not covered by agreement. I feel like he has protected his interests over the years by not marrying me - but now he can't understand me wanting to protect mine.