Should I confront my gym trainer about this behaviour?

It's been 2 months since I've started hitting the gym and I am still learning.. There's this another girl who joined a month ago and we do our workouts together.. Whenever she does something wrong or lifts some heavy weight, my gym trainer starts blaming me and says keep an eye on her.. How would I know whether a particular weight would be too heavy for her because I lift the same weight.. I am still inexperienced, I can't guide her.. My gym trainer got irritated at me yesterday that why is she using the 20 kg plate, why didn't you say anything, and he even made an annoyed face towards me.. This is really pissing me off but I'm just not saying anything.. I feel like I'll explode one day

Should I confront my gym trainer about this behaviour?
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