Yes. Well, sort of. I mean, as you note-- this isn't about
physical "interest" of a romantic nature, it's more about an intense one-on-one "relationship" of some sort.
DD's first crush like this was with a classmate-- and was fully reciprocal, btw-- she was almost 12, and her classmate had just turned 14. They knew one another quite well, and it had grown very naturally out of that, and their close friendship with one another. She is STILL close friends with this person-- both are in college (at rival flagship uni's, in fact). It sounds very very similar to what you're describing, UM.
As far as I've been able to tell, this is yet another facet of her asynchrony-- she really IS ready to be a serious girlfriend to someone. It's that most of her peers are not, if that makes any sense. It's a hard thing to describe-- she won't ALLOW someone that she's involved with to be doing self-destructive things without saying something (usually gently and effectively). Her version of "caring" is doing things like making sure that her partner is well-rested, not in trouble with other friends/family, etc. etc. This also translates into her not really giving the time of day to "bad" or risk-taking people, though-- so drugs/alcohol/sex are not really things that she is having to fend off. She doesn't hang out with people who lean that direction. It is surprisingly mature.
Her current partner's parents have noted that to us.
The magic mix there seems to be that they KNOW that she is PG, but it doesn't actually define her with them-- that is, she is {DD} rather than her exceptionalities, which are numerous.
The parents are not competitive over it, and neither are the two youngsters. They support one another without stepping on one another's toes, and they share some (but not all) of their interests, and have a similar pattern of asynchrony (with physical lagging the rest).
The other youngster is also quite clearly some flavor of gifted-- and 2e, which means that parents
understand that we're not helicopter parents, just loving and healthily aware of our DD's life, and believing that kids need guidance whether they are always thrilled about it or not, and that such kids have idiosyncratic developmental arcs.
That last point is really key, honestly.
They've seen enough of DD to know that in spite of the apparent seriousness of the relationship, she is NOT brazen or overly sexualized or anything like it. She's EMOTIONALLY at a different place than her physical years on the planet, that's all.
DD talks to me-- VERY openly, and I'm a pretty neutral listener. I've also remained vigilant and
highly involved. I'm neither overtly encouraging her-- nor
judging what she tells me. I'm treating what she tells me as being at more or less face value, and at the maturity level that is PRESENTING to me.
It's disconcerting, to be sure, when what comes out of her mouth is more along the lines of what one might expect from a 21 or 22yo disclosing to a best girlfriend... and those ARE the kinds of things she is thinking.
But she really IS thinking them. It's not me making assumptions about what is running through her head. I ask a lot of questions and make few statements, if that helps.
