My face is covered with acne since I was 13 years old. Now I'm 20 years old. I'm facing acne scars. I loss my confidence. So anybody can tell me suggestions to treat this problem. Please let me know. Thank you. 

You can lighten these marks by using something that contains kojic acid or licorice extracts, and also regular usage of a good sunscreen, you can get product suggestions on reddit, a subreddit named skincareaddiction. Good luck!

Got the same issue, you can check my topic. One thing I do suggest is the use of sunscreen with zinc and which doesn't block your pores. Time will fade them but it may take a bit long.
Vitamin C serum may lighten the spots