obsess

Many teenagers obsess over their social media followers and the number of likes they get.

(Chinese) 许多青少年过度关注他们的社交媒体粉丝量和获得的点赞数。

He started to obsess about the small scratch on his new car until he finally got it fixed.

(Chinese) 他开始对他新车上的那道小划痕耿耿于怀，直到最后把它修好。