4 years together and no commitment in sight

I already know what I should do deep down but I guess I need to just get this out there.

I have been when my bf for 4 years. I am 33 and he is 37. We bought a house about 2 years ago and the house is in my name only but he put $30,000 down on it. We also have vehicles and other stuff in our names together. I have been talking about marriage for the last two years and he kept saying we will get there, stop asking it will happen, you’re going to ruin the surprise.. all that fun stuff. So in my heart, I’m truly thinking it’s going to be happen. Fast forward to last week, our 4 year anniversary passed. It was literally just another day and I was heartbroken he didn’t do anything for us. I actually had something planned but ended up canceling because of how upset I was. I flat out asked him “do you ever plan on marrying me” and his answer was “im just not there yet” Im heartbroken. I know if he isn’t ready now, he’s not going to be but I’m so confused!!!

So I told him I was leaving. The house we bought is 4 acres, 40 mins from work, in the country and I absolutely hate it. I manage apartments and can move into where I work whenever but since I own the house, I need to be smarter. However the house issue is hard to get out of. He can’t afford it alone, I don’t want it, tried to convince him we need to sell it and no luck there. Im in a rock and a hard place and don’t know where to start. He also tore out one of the bathrooms to studs to remodel it a year ago and hasn’t done a thing to it so that needs to get fixed before anything as well. But I feel like I need to move out now. This feeling is awful day in and day out knowing he never truly ever was going to commit.

Now I think he realizes I’m going to leave and he’s being nicer, compassionate, wanting to work on things and it’s confusing. Also I keep trying to communicate with him on what the next steps are and it’s like pulling teeth!! He shuts down, won’t talk about anything and when I’m sitting there vulnerable and crying because I feel so lost, he looks at me and says “idk what to say”

What would you do?

Also- when he gave me the $30,000 for the house, he signed a legal document claiming it was a gift and did not have to be repaid. We had a notary sign it as well. And no. He is not on the deed.