My partner of 12 years is refusing to propose because he's not "romantic". Help :(

We've been together for 12 years (I'm 29, he's 32). We got together at a young age and were learning life with our son so marriage wasn't always on my mind until a few years ago.

In the past, his comments always promised a wedding/marriage with nothing happening. Three years ago, I told him I wanted to get married. From then till now we've talked about it often but he'll either shut down or make big promises resulting to nothing.

Well, this week we had another talk and he told me we can get married but he is not going to propose ever. Saying he's not romantic and we can just buy rings, go to the court, and call it a day (his words). I'm conflicted because I give so much with little in return. I know I'm at fault for this but I love him and want him to be happy. I'm not asking for a big gesture, but effort, to show me that he truly wants this. His offer feels like a shut up ring/marriage and it doesn't sit right with me.

I shouldn't have to beg him to make me his wife and I'm seriously considering leaving. Our relationship is me giving 90% and him returning 10% (he admits this) I'm exhausted. I'm turning 30 soon, I can't keep putting up with this. What should I do?

EDIT: Tysm, to everyone who's left a comment. I am trying to respond to all but it means so much.