I (33F) would like to be engaged to my boyfriend (35M) of 5 years. We have been discussing marriage and children for years but are not engaged. I am done waiting.

Hi, this is my first post so I hope I get the format right. I have been with my boyfriend for 5 years, we are in a committed relationship and live together. I have also moved across the country 3 times for him so he can grow his business. I thought that things would happen organically like being engaged but they didn't. I am done waiting.
There is no question about whether we love each other, we do beyond doubt and he is the love of my life. But, I am ready to and want to start a family together. Whether that means getting engaged or starting to try for a child.
We have talked about this so many times over the course of our relationship, stuff like 'I can't wait until we have children and ...' and also more serious conversations like how I really want to get married.
I have reached the point where I have made it very clear that I want commitment and I am concerned about waiting and having fertility problems. It got to the point where I issued an ultimatum, I am ready to and would like to start a future and family with him. If he is not ready I will move on with my life. The ultimatum was not to force him to propose, it was to find out whether we have a future and to get actions rather than words. If I never became a mother I would regret it.
After I issued my ultimatum (I have had enough) he asked me for more time. I gave him more time (3 weeks since I had enough) but didn't get any more commitment.
He said he does want to get married to me and have children one day, but not right now. He said it's not a great time as he's busy building his business and would like to be more financially stable. He also feels like I sprung this on him with the ultimatum (disregarding the discussions over the years).
He doesn't have a great concept of time, and I am the realist and if we need to be somewhere at a certain time, have something organised in advance its me. He said he thinks maybe he is just being a coward but I also should have just waited until he was ready which was the end of the year. But he told me 3 years ago it would be the new year.
He said that he takes time to decide things and is a very rational person, it took 7 dates for him to kiss me. He said he is still processing about being married and having kids and needs time to think.
After the ultimatum he got a ring designed (he picked ring, if it was up to me it would be a cheap fake diamond). But this is now on hold because it's been 3 weeks since my I have had enough ultimatum and I had enough and went home to my family.
I have also made it clear that expensive ring and extravagant proposal are not important to me. So it's not a money thing. All I asked is that he ask my parents for my hand in marriage out of respect. He asked his parents but not mine. I feel that by not asking by parents, or proposing to me, he hasn't shown commitment or done something he is accountable for.
My fear is that I have doomed this already by issuing an ultimatum, and my other fear is that if I hung around I would still just keep waiting and effect my fertility rate even more. The whole proposal thing seems very dated in that for one of the biggest decisions of our lives, I have to wait to be asked. I could ask him but he wants this part of the relationship to be traditional.
Has anyone ever been in this situation and how did it turn out?
TL/DR I want commitment (marriage / start family) with boyfriend, he is not ready. Issued ultimatum and am done waiting.


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