grow apart means stop being friends over time (e.g. My best friend and I grew apart after she changed schools.)
grow back means regrow (e.g. My roses grew back this summer.)
grow into something (e.g. This bike is too big for him now, but he should grow into it by next year.)
grow out of something means get too big for (e.g. Elizabeth needs a new pair of shoes because she has grown out of her old ones.)
grow up means become an adult (e.g. Dul was born in Korea but grew up in England)