1 Don't change anything about yourself, you are good enough. <-- anything. A typo, I think.
2 Stop pretending to be happy, we know you are depressed. <-- great. They seem separate sentences, so I'd use a full stop (period) or another choice of stop where you use a comma.
3 Will the boss pay us for the overwork? <-- overtime?
overworking has the feeling of doing more than asked.
overtime has the feeling of working longer because it is expected or required
(May vary from place to pl;ace)
4 I regret being born in my country. <-- great
5 I am so sick of the people who I work with. <-- maybe this should be whom? But regardless
"I am so sick of the people I work with." sounds more natural to me.