I am a mental retard when it comes to picking out clothes for myself?

I completely lack of sense of style so usually I'll have my mom or a good friend come with me because they always know what looks good on me.. this is why I leave stores empty-handed like 90% of the time.. Wtf else can I do.. the reason I know I do is because sometimes I'll see something or buy it and my mom will say "eww" so plzz help out a complete and utter retard