Hello there,
I hope everything is going well/ improving in all aspects of your life; personal and professional. Doing everything for your roommate not only crippled her, but you as well. Embrace the gift of separation from her and continue to work on yourself. No contact is certainly a great tool for all of us that have experienced relationships with people that have greater struggles. If you ever do run into her or she tries to contact you, apologizing to you for her behavior, etc. If want to remain NC then go ahead, or if you are still feeling responsible/guilty, accept her apology and then continue with your life. There is a ton of information about no contact online and for those individuals that have gone months and even years, the guilt that they once felt inside for somebody else’s behavior goes away and if they ever do run into that person again, they either a. stay NC or b. acknowledge the person with no regard/care and move on. They leave that person to go with the wind.
Take what you learned from this experience and in the future if you have another roommate practice that assertiveness and vocalization.
Take Care