How should my friend dump his girlfriend?

so my friend has this gf and she fu*ing loves him but he doesnt really like her. he doesnt like doing anything pda with her, he doesnt like talking to her. he said he never talks to her and if he didnt have to he would NEVER talk to her. it doesnt sound very fun. and he thinks half the things she does are annoying. and she hates all the stuff he does. but anyways, if he dumps her her parents will freak out, she will freak out, itll cause a panic. but how should he dump this chick?