ADC who's KDA's and CS are good, but damage output is lacking. Help me stop ksing!

Hi! I'm a b4 ADC who's KDA and CS are usually pretty good compared to my teammates (I'm not saying I'm better than my teammates), and by that standard it seems like I carry. But whenever I look at the damage stats I'm always behind one or two other people. What can I do to improve my play so that I can deal as much damage as an ADC is supposed to? Do I need to be more aggressive in fights? Start more fights? I want to stop playing like trash and I think improving my damage will really help me improve. I am currently maining Twitch btw.