Dangerous operation of a motor vehicle question.?

Depending on what state you live in . Yes they can arrest you charges can very from reckless operation , Attempt to race (in some states) suspension of being under the influence of a substance.Your friend by not getting involved was your only witness it the facts you state were true then he/she should have spoken up.Thats strike one and with a eye witness thats strike 2 and depending on what the charge and how you handled yourself with the officer that could have been strike 3..To answer your question yes your friend did more harm than good in this case.