I'm trying to get more into fashion myself but it does seem a bit alienating? I don't even fully understand how to procure recommended fits and stuff. I wouldn't go as far as to say it's the reason you have trouble "making friends", but it probably does hinder your dating opportunities.

I’m not exactly sure how I’m supposed to tell what colors best suit my skin tone/go well together

I’m not sure why something so minor would make or break continuing to hang out with someone but it seems like that is that case

What I can tell you for sure it's that it's not just the colors you're wearing, usually you can just not think about it too much and combine your tans and your whites, or your blacks with, errr, more black and not do too badly. But there's a world of difference between wearing a logo t and a properly fitting button-up shirt with a sports coat. like certain clothes are tailored to enhance the form of your body and certain clothes do not. Suits are meant to make your shoulders look broader and your waist seem slimmer, for example, which makes for a more pleasant sillhouette. On the contrary, most body types do badly when wearing a t-shirt. That's really what makes the difference here. Unfortunately I don't have specific tips, except that if someone is threatening to end your friendship over your fashion sense, at least pester them for some advice first? I mean what kind of shitty friend breaks up a friendship over clothes lol