Is This Low Self- Esteem??

OK, so a few weeks back I was talking to some co-workers about one of my friends getting recently engaged. Well we were talking about how her ring doesnt exactly look like an engagement ring. Its not a diamond ring, its a sapphire, and if you just looked at her hand you wouldnt know it was an engagement on, youd think its a normal ring (I can see some unknowing person going "So how come your not wearing your ring").
Anyways, we're all kind of saying that it should have been a diamond or at least cubic zicornia. Normally, I wouldnt be making fun of the ring or anything, but i dislike her finance and only tolerate him as my other friends so because we love her, plau the fact that he bragged that not even the people at Microsoft and Bill Gates could afford the ring, and that he picked it out b/c HE liked it, not her. When she told me she got engaged, how much the ring cost and believe me Bill Gates could afford 10 thousand of them
Anywho, Ive always said I didnt need an engagement ring and that got some stares. Then they started to talk about the rings they wanted and how big the carrats HAD to be... thats when I said ...

You be grateful to be getting a ring in the first place? There is no need to be picky or fussy over a ring.

Thats when I was told I have some self -esteem issues. One of them was like it seems like you'll take a ring from anyone, byt that statement. Thats completely not what I meant.
What i meant is .... if this is someone who you truely love and youve wanted to ask that person to marry you, you should be happy that person wants to put a ring on your hand and not bitching b/c of the size, carrats, style whatever of it. Would it be nice to have the ring you want? Sure! But ppl buy what the can afford.
Anyone see where I have low self-esteem here???