<human>: Could you distill the essence of the text into 1-3 sentences?

I'm 25 f. My partner is 30, male. We've been together for 3 years, and it has been amazing. Everything is lining up right. The only thing bugging me is that we have never talked marriage. I don't know why, but it's the only thing that I can't bring myself to bring up. The only time it was ever talked about was a few months into the relationship when his mom asked him if I was "the one". The timing was awful, of course we wouldn't know then, despite already having a very strong bond. We were friends for years prior. 

So how do I bring it up? A lot of our friends are married, so I always come close to saying "So-and-so's wedding was so lovely, what do you think ours will be like?" but immediately freeze up. I don't want to seem ring hungry or wedding crazy, but I'd really like to make this commitment eventually (a couple more years maybe?) and would like to know if he's on the same page as far as this goes. We already live together. We share a bank account for household expenses.  We have talked about eventually buying a house together. 

The problem is, I'm not traditional in the sense of "Relationships have to progress from A to B then C" so it's almost out of character to think about marriage. I was raised very non-traditionally, and I always thought I would be the type of person to be with their partner forever and never get married, but now that I'm with someone that I can live with happily, I'm starting to change my tune. My parents were monogamous but I was raised in a group situation and no one was "traditional" by any means. 

Is it appropriate to go to his mother for advice? She and I aren't SUPER close, but I love her and she loves me, and knows her son very well. 

I know this is a super lame question, compared with everyone else's, but being raised in a communal family with many caretakes/"parents" and siblings, I feel like wanting something traditional is so weird that I don't know how to approach it.
<bot>: How do I bring up the possibility of being married in the future without seeming like I'm probing for a diamond (I'd probably just wear my Gram's wedding ring anyway)