I don't want to speak to my mom
What's the reason for you not wanting to speak with your own mother?
She is very critical of me.
You should spend time with your mom. She loves you and even though she's critical, you should respect her.
I'm keeping things to myself.
That doesn't help your situation! I am sure you'd like to speak with your mom again, and letting her know your issues might make things so much better between the two of you. Show her the respect that you want to receive from her.