Like many of the women on this thread, I did not have a proposal. I said after 10 years together that marriage was important to me and he agreed we could start looking at venues. I made some appointments for us, after we discussed guest numbers, budget, type of ceremony etc together. Very quickly we picked one which ticked all our boxes and paid a deposit.
After we set a date, DH did say we should get me an engagement ring, but I thought it seemed a waste of money. We spent it on an open bar instead

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In the end I did get the wedding and honeymoon of my dreams, and even though he was a bit shocked by the projected costs at first, he did pay half without complaint, because he knew it was going to make me happy.
I guess the point I'm trying to make OP is, he might be crap at proposals, but lots of men are, and they are not all crap at planning a wedding and being a husband. To the PPs saying that he obviously doesn't want to marry you, that is not necessarily the case. My OH didn't want to 'propose' to me, but he absolutely loved being The Groom, and told me later he has never been happier his entire life, as he is now that he is a married man.
I still don't have an engagement ring, but I'm perfectly happy with my wedding band. Just ask him if you can start looking at venues, ask him if he wants civil or church ceremony, ask him who his mum wants to invite, talk to him about future plans, from the honeymoon, to your first home, kids and beyond, start a real conversation about it.
get the ball rolling.......