Your mother probably still sees you making poor choices while you are attempting to be more assertive. Remember, with being independent also comes the need to know how to make wise decisions that won't end up destroying your future life. It takes maturity but also the ability to use your logical mind....something you haven't learned how to do yet either. That is just as important as being more assertive.

When parents see us making really bad desisions for ourselves (even poor choices in friends boy or girl, or make poor behavior choices) parents tend to to want to protect & are less likely to want to let go.

If you show good judgments along with assertiveness then parents realize you are growing up & becoming able to be responsible for yourself & are a lot more willing to let go