be there for someone idiom
总在（某人）身边（提供帮助或支持）；不离（某人）左右
to be available to provide help and support for someone
We haven't always been close, but she was there for me when I needed her. 我们并非总是很亲密，但每当我需要她时，她总会在我身边。
Best friends are always there for each other in times of trouble. 在困难时最好的朋友总会伴随身边。