<human>: Can you condense the text into three sentences or less?

I have been with my boyfriend for four years. It's a solid, stable, healthy relationship and he is great. We still feel like we're in the early stages of a relationship, with all the sex, giggling, playfulness to match. Basically, lots of happiness. 

We're both in graduate school pursuing difficult fields that we love, and we're both rather poverty stricken. Our parents don't financially support us in any way (a lot our friends seem to have parents who do... it seems common for our very expensive city.) So we struggle by the best we can. 

We don't talk about marriage much except in fantasy terms now and then, and my boyfriend has made it clear the reason he won't propose anytime soon is because he simply doesn't have the money for a ring or to support a stable lifestyle of another human being, or if we were to decide to have a kid. Also we can't afford to get married unless we were to go to a courtroom kind of ceremony, and we both fantasize about at least a decently nice wedding with our friends and family. 

I am fine with it except occasionally I get paranoid about it... because every now and then, I have female friends who will say things like "No ring after four years? Wow... I wouldn't do it, but... I mean you must be really secure in your relationship to put up with that." Pretty much EVERYONE I know who has been in a relationship for longer than two years seems to get engaged right away. I know half these marriages will end in divorce (just plain fact) but sometimes I start to get nervous that, am I being "stupid" for not wanting him to marry me after such a long time together? 

Basically, often acquaintances or friends will seem to suggest that he must be stringing me along for having not proposed after this long. 

I'd be interested to hear if anyone else has been in longterm relationships or just has advice about how to handle comments like this, or if I should be worried at all...

[
<bot>: Longterm boyfriend and I have no plans to get married anytime soon. Friends/acquaintances seem to say we are odd or that he's stringing me along.]