Op, you can’t be that young if you’ve been together 10yrs, why are you letting him call all the shots. Why, just Why? So many red flags here....
I think 10yrs and no sign of an engagement is a huge red flag in itself, without the house/money. He has no intention of marrying you or having children, he will just string you along for years and years.
House-wise, you should have as much say in what you buy as him, in terms of both house and cost. If he wants to protect his money, then do it officially via your house-buying solicitor, but I bet when you suggest it, his answer will be that he will set up an agreement himself, when he has absolutely no intention of doing so!
You’ve already told us his background in terms of his dad and brother, can you see him ever treating you fairly?
Money is his first love... There is a MN saying “when someone tells you who they are, believe them.” Surely you should be his first love?
I have been married 23+ yrs, 2 DC, marriage and kids always have ups and downs, and will only survive if you both on same wavelength.
We both had houses to sell when we were engaged, mine with v little equity, DHs with lots. Both went on market together, his sold and completed about 6wks before we married. He immediately insisted on clearing my mortgage, no agreements, no requesting that he was added to my deeds. Think about what that said about my DH, how trusting he was - would yours have done the same?
My house sold and completed after we married, we rented for a few months, then bought the house we still in - joint names, joint bank accounts, joint savings - everything. No talk of me “paying him back”.
I went PT after having kids, still PT now despite not needing to be, but I have added to the pot in other ways, an inheritance, endowments, share windfall - everything is joint.