los dos significan el mismo, sino que "예" se siente un poco más formal. aquellos son las pronunciaciones correctas.

Edited to clear up the info, as Korean age can be confusing: The above is correct. When you are born, you're 1. You gain a year when New Year's passes. To come up with your Korean age, add 2 if your birthday hasn't passed, add 1 if it has. The law follows your actual age. Korean age does not really affect your legal rights or privileges. If you are born early in the year and entered school earlier than others born in your year, you might be considered a year older, depending on who you're with (however, young children entering school now enter with others born in their calendar year). Your Eastern astrological sign still follows the Lunar calendar (if you are asked for your "띠"). Modern society tends to follow the "western" calendar, but many traditions still tend to follow the Lunar calendar. There's a mix. This was what I meant. My previous posting was just what I learned from my time there. Sorry if it caused confusion.

How about, "나는 어떤 사람들에게 친구가 아니라 걸림돌 같은 존재라고 느낀다." 아니면 "나는 어떤 사람들한테 잘 해주지 못하고 귀찮게 하고 있다고 느낀다."

그리고 means "and" and is a conjunction used at the beginning of a sentence. 그래서 means something like "so" or "therefore," and is another conjunction that you use at the beginning of a sentence. 와 and 과 both mean "and." They are used to link two or more nouns in a list. 와 is used if the preceding word ended in a vowel sound, while 과 is used if the preceding word ended in a consonant sound. For example, "너와 나" (You and I) or "볼펜과 연필" (pen and pencil). 하고 is also "and" and could be used in the same way (볼펜하고 연필), though 하고 is more often used in conversation rather than in writing. 와 and 과 appear often in writing. However, they are pretty much interchangeable. 하고 is also used to combine actions that end with 하다. For example, 나는 운동하고 자요 (I exercise and sleep). A nuance here is that the first action precedes the second in time order, but not always. It's contextual. Consequently, an action that does not end in 하다 can be joined with -고, as in, 나는 먹고 자요 (I eat and sleep). Hope that helps.

From my experience, in a formal, polite context, it's best to use the person's name, followed by 씨. You might also use the person's title, such as 선생님, 부장님, etc. You generally wouldn't say "you" in a formal situation, particularly to someone of a higher status/level or older age than you. For family members, you'd call them by 엄마, 아빠, 할머니, etc. 당신, 자기, these mean "you" in an intimate way; 자기 and 여보 generally between boyfriend and girlfriend, or husband and wife; 자기 can be used in a very close friendship, but usually from the older person to the younger, and pretty much only among women. 당신 can be used if the person is generally the same level as you, but still not a really close relationship. I've heard it used more in television or in movies; I've also heard it used in real life, but in a more ironic manner. 당신 can also be used in a romantic relationship. 그대 is almost always used in song lyrics or poetry, rarely in real life settings. 자네 is "you" to someone on a lower level, but usually by people who are a little advanced in age. 너 is the basic, common, casual, friendly "you," but only to someone of an equal or lower age, and usually only if the relationship is close. You wouldn't use it to a good friend if the friend is older; in that case, you'd say something like 언니, 오빠, or 선배, depending on where you met them, and depending on how much older they are. Of course, if it's agreed beforehand, you might be able to say 너 to someone older than you, but it's very, very rare. There are more nuances to this than I can explain, but I hope that helps answer your question. In short, you really wouldn't say "you" to someone older than you, only to someone your age or younger.