*ему неприятности в профессиональной и личной жизни, однако у него и такие черты характера, которых экстраверты могут завидовать. Короче, как выжить, если ты интроверт? Просто найти свои хорошие качества и будь собой.

I think that cute is something what we can use to define for example for a cat he's puffy and sweet so he's cute. Pretty... I think that it's word what can specify a young man (boy) or woman. it's use for young and delicate people, I think. And beautiful - it's only for women, we rather won't say "beautiful man". It's very similar to pretty but rather for woman. I hope that I help you, but it's my little opinion :)

In my language "Szczęśliwego Nowego Roku". It's polish. Happy New Year to you all :)