If you think your mother needs counselling you will need to speak with her about it and take her to a counsellor. But , since you are the one posting a question may be you need help managing your relationship with her and learn skills to do that.
Next Steps
Seek help to understand and learn skills to manage your relationship. No matter how much we want, we really cannot change another person . But we can for sure learn how to manage people and problems in life. Incase your mother is wiling and open to the idea of going to a therapist to help evaluate atlas her relationship with you and how her behaviour is troubling your relationship etc, may be she's a point in seeking help