How can I stop wanting an engagement ring?

If you want a ring, buy yourself one. Problem solved.

Because you don't need one to be engaged.

Go buy yourself a ring.http://www.swarovski.com/Web_US/en/5257663/product/Fragment_Ring.html
Stackable rings are fun :http://www.ross-simons.com/jewelry/rings/stackable/navigate.jsp

I've been with my fiance for over 10 years and living together for about 9 years. Living with some one can be the best way to find out if you're ready to get married to them, as you get to know them more then you would from just dating them.
If you're ready to get married then have a chat with your partner about it and see how they feel about getting married to you and if they're ready to get married to you. Marriage is a serious commitment for some guys, they also need to know if they're ready to stop dating for a long time, to be with one person for the rest of their lives.
When I asked about marriage, he kept using the excuse that he didn't want to get married or that he wasn't ready to propose. Then I found out that we were in serious debt, to the point of possibly losing our home. I had to put the thought of getting engaged out of my mind for a while (not expecting it to happen at every event or holiday and not getting disappointed if it didn't happen). Things slowly turned around for us and we got out of debt. He proposed last November and we're planning on getting married July 2017.

Stop being despite?

Do you mean FROM someone?
Sit them down and say you think it's time to settle down.
Otherwise, just go buy yourself a nice ring.

By reminding yourself that it's not really a piece of jewelry that you want. What you really want is a commitment from a man who is clearly unwilling to give you that commitment. Not surprising when you think about it, because it was you who set things up so that he wouldn't have to propose.

Lesson to learn for future relationships: If marriage is your goal, shacking up is the biggest mistake you can make.