Boys be honest we don't even know each other i wear US 8 what do you think about a girl with such size am i considered fat? And will it be okay if i wear a high waisted shorts or shorts in general i've been wanting but i really don't know what will people think of me i don't want to look gross in them especially the high waisted ones...
Some women will kill to be a size 8 lol. maybe its a little big for your age range but don't let that bother you. wear anything you want, just keep the revealing (if you plan to) to a decent level. also don't worry about what people will think, if you have that attitude like you are modeling them shorts, you are going to look good anyway.
Size 8 isn't fat. Don't ask men because they generally have zero knowledge on sizing for women. I'm currently a 6, an 8 in some brands. Personally, even if I was stick thin, I would never fit a 0, cause my hips are too big. So pants size is sort of irrelevant. Also, you said you're 5'4, and I would say a size 8 is perfectly fine.
If you want to wear shorts, wear shorts. You're not fat, and even if you were, who gives a freaking fuck! If it's hot, wear shorts! Wear what you like.
I know nothing about sizes hahaha sorry I am extremely small... probably too small so I don't know what a size 8 looks like but from what I have gathered size 8 is a perfectly healthy weight. And even if it wasn't healthy you can wear whatever you want and you will look beautiful as long as you wear it with confidence. Don't let men's opinions stop you from wearing what you like because if you change for them the man who would have liked you for you will never be able to find you because you were too worried about the boys who didn't matter.