I really don't agree with this. You have a fairly substantial age gap and he is likely more settled into a career than you (note the word 'likely'...because I could be wrong). On top of that, as hard is it sounds, waiting for you to mature out of 23 is not unreasonable. It's not to say you are immature either. It's simply not that point blank in your 20s. The mind set is far different between those ages and if a wealth gap does in fact exist, he will likely be more reserved.  

So here's my bit on it. If you're happy and he's happy. Why are you so hell bent on getting a ring?