be there for someone

be there for (one)

To provide or be available to provide support to one. I promised to be there for my friend Ann after her mother died. You were always there for us, Mom, even when we didn't appreciate it.
See also: there
Farlex Dictionary of Idioms.

be there for someone

SPOKEN
COMMON If you are there for someone, you are ready to listen to their problems and to help and support them. Jimmy has always been a good friend to me and always been there for me with bits of advice. I said, `I'll be there for you', which is all he wanted really.
See also: someone, there
Collins COBUILD Idioms Dictionary, 3rd ed.

be there for someone

be available to provide support or comfort for someone, especially at a time of adversity.
1998 Spectator Elegant, determined and intelligent, she was the perfect tycoon's wife: always there for her husband and ready to defend him.
See also: someone, there
Farlex Partner Idioms Dictionary
See also:
  • be there for (one)
  • be there for somebody
  • give (one) a leg up
  • give somebody a leg-up
  • give someone a leg up
  • provide for (someone or something)
  • emotional support animal
  • emotional support dog/cat/etc.
  • turn King's/Queen's evidence
  • ESA