I'm a 6'3 (1.91m) girl. I'm 18 years old! I've got quite slim too.
What I was wondering is whether I'm "too tall"for society. For example in 6th form I'm the tallest there including boys and most of my friends are Like 5'3 so they're tiny next to me. Whenever We take pictures we can't do any cute poses cause the difference is too much. I also can't wear heels as then I'd just be massive. I've never had a boyfriend because of this. I know there are slight benefits but the negatives are too much. People always point out my height and ask to compare sizes with me as it makes girls feel more "delicate" when my hand is like double the size of theirs.
Makes most guys feel insecure tbh
6'3 is not that tall dont worry the average height of men is 6'10
There's no such thing as too tall or too short unless you're trying to enlist in something with a height requirement, but it's definitely unusual for a woman to be that tall.
It'll probably be too tall for most guys but fortunately for you, men are much likelier to be in the 6ft3+ category than you are as a woman, so your options are not that limited.
Other than that, don't slouch. I think that's what a lot of tall girls do due to being insecure as a result of their height and it doesn't help at all.