Come to a place of acceptance about your mom. Love her at a distance, like Spirit Led Ed recommended. You can't change her mind. That's God's realm. He can woo her with His Holy Spirit, but she can still say no. If I know God like I think I know Him, He is working on your mom even now and has been, and will be in the future. Take hope, my young sister, and live your life to the fullest.
Many adults do not get along with their moms. The ones you hear about so much are the ones who DO get along with their moms. I am glad about that and all, but they really do not have any idea how it hurts others when they take for granted a loving mom, a mom who wants to love her grandchildren, a mom who is still interested in your life. Not all moms do this. My mom didn't. She's gone now, and in heaven our relationship will be restored to right positions.
I'm stubborn too, and some of it is my fault.
Ask God also to search your heart and see if He can find anything in the way of errors. You will be glad that you did. He is a good God, He is on your side, but still you must be pliable to Him and accountable to Him no matter what your mom does.
I know it is hard. But no one every promised the Christian life would always be easy. He is with you in the fire. His promises to you will be fulfilled in His perfect time.
love you,
Jan