Nah, I have more experience with strong Se valuers than any other type and I know for a fact that they can go HARD when it comes to partying, especially the Se leads that are enneagram 7s (which many of them are)**.
For one, you assume that all party goers have exactly the same priorities and motivations for partying and they don’t. In Socionics, both SEEs and ESEs have 4D Se and Fe (part of the SF/’Social’ club which should tell you all you need to know) but they cognitively prefer one over the other. My SEE (E7w8) mother has always been the ultimate “party girl,” but her focus is on making an Se impact, first and foremost, by way of her energy, her aesthetic/style, her presence, and creating an extravagant spectacle, a powerful experience where, ideally, she is the center of attention,
the “light source.”
And the degree of her turn up always depends on what she [Fi] personally wants/desires/chooses to do in that moment, others be damned, even though with demonstrative Fe she’s great at making sure others are enjoying themselves as well. But my mother could be the only one dancing in the center of the room and be just fine with that–her desire to party is self focused, not others focused, as would more so be the case with ESEs as Fe leads. They’re more concerned with directly influencing and feeding off of the emotions of others in order to create a certain vibe and mood. They can’t help but be tuned into whether or not everyone is feeling good and therefore, having fun–they are Fi ignoring and would de-prioritize their own subjective feeling in favor of the objective, group feeling. Incidentally, I remember you saying before that you could feel/take on the emotions of other people and only Fe valuers do that; Fi users like SEEs don’t access empathy through that channel. I also remember seeing your type me video and I didn’t get Se lead, at all. Neither do you VI like an SEE.
**though I think some typology systems (e.g., MBTI, Socionics, Enneagram) are more flawed, inconsistent and lacking than others, essentially they are all aiming to describe the same underlying patterns and phenomena, and I believe that a synthesis between the systems comes closest to the “truth.” I don't think the differences between MBTI and Socionics significantly alter how the types manifest; I actually think the type profiles from both systems feature and prioritize different "sub types" (better explained by DCNH or Enneagram, for example).
You're describing EXXp (flexible-maneuvering) temperament, overall.
1.) At your age, your Ego functions are still developing (in addition to your Super Ego), let alone anything else. It would be common and almost expected to feel a certain repugnance or disconnect from your subconscious functions. Therefore, you not being that into Si right now would not necessarily discount you valuing it.
2.) Even supposing that everyone you've typed as SEI is indeed SEI (and there is a chance that's not the case), a staple of Socionics is IR theory and if you are uncertain of your own type, then it is very difficult to discern if you're actually experiencing the appropriate cognitive compatibility/incompatibility with SEI and other types that you think you are. Se leads don't typically have terrible IR, to the point of hate, with SEIs; your worst relation should be LII. Of course, there are always possible exceptions but I only deal in likelihoods. It's also possible that bad blood and funky family dynamics (that aren't type related) can sour certain relations that might otherwise be favorable.
3.) Also, enneagram 3s are identity seeking image types and, of course I could always be wrong, but it seems to me that you have a lot invested in coming off a certain way (that embodies a certain "Se" strength and power) which might also be clouding your judgment concerning your type.
4.) These are my thoughts and I stand by them but at the end of the day, do you, boo.