Understanding yourself definition requires examining multiple perspectives and considerations. "And you?" or "And yourself?" as response to "How are you?". And yourself?" 'Yourself' sounds more formal, and is used frequently in everyday language (at least in my surroundings). However, I've been doing a little bit of investigation into the use of my vs myself and you vs yourself and it seems that it is only used reflexively to reflect back to 'you' or 'me' as the subject. E.g., you hurt yourself. Similarly, pronouns - When is it correct to use "yourself" and "myself" (versus ....
15 Using "yourself" and "ourselves" in these contexts is incorrect. "Yourself," "ourselves," and "myself" are reflexive pronouns, correctly used when the subject/actor of the sentence and the object/recipient are the same person or group. "I see myself" is correct because I am doing the seeing and am seeing myself. pronouns - Yourself vs By yourself/On your own - English Language ....
Equally important, yourself stresses that YOU (personally), as opposed to others, can be the agent of that choice. Moreover, by yourself / on your own stresses more that you make this choice alone, without help from others. - English Language & Usage Stack Exchange. Equally important, you use yourself as the object to refer to the second person (you) when the subject already contains the second person (you). Examples: You see yourself as an artist.

Consider yourself lucky. In this context, imperatives always have the implied subject, you. Based on that information, the following sentence would be the better choice: What is a nice, smart girl like you hanging around them for? phrases - Put oneself together vs. pull oneself together - English ....
For the phrase "putting yourself together," I can see that it doesn't mean controlling your emotions to deal with a situation. So, I did some research and found that "to put oneself together" can mean making one look nice, maybe by dressing up or using makeup, which fits the context of the sentence above. Difference between "Do it yourself" and "Do it by yourself".

Do it yourself is closely associated with making repairs and improvements to houses and automobiles without the aid of professionals, to the extent that do-it-yourself has entered the dictionary as an adjective (e.g. do-it-yourself project or do-it-yourself manual) and DIY is the name of a television network with shows about people who do their ... You yourself - double pronoun - English Language & Usage Stack Exchange. From another angle, you have made it up yourself.
This is obviously ok. But if the pronoun it should be repalced by a long noun-phrase: You have made up the illusory world in which you move yourself. In this context, use of reflexive pronoun (you or yourself)? Reflexive pronouns like yourself should only be used if the corresponding non-reflexive pronoun (in this case, you) has already been used in the sentence.


📝 Summary
Knowing about yourself definition is valuable for anyone interested in this area. The information presented here works as a comprehensive guide for ongoing development.
