Do you think most Cos-players don't dress up for fun but only to feel more closer to being the character and start trying to act like the character and forget who they actually are. I seen some teen girls trying to look like H a i k y u u characters thinking they look like hot guys and trying to act like them.

Uh— I would say yes and no. Some cosplayers could cosplay to BE like that character, and some may just do it because they like the character a lot.
I don’t really cosplay but I’ve seen people that do. Some cosplay try to act like the character just to act out the character like they are in the anime/show etc. using it for guys is kinda questionable, I’m not really sure why they’d do that..?? But anyways I hope this helps

White flour this don't make sense

Iwould say asking questions. even over the small things because then you can get an answer that should you to understand more.