I am so sorry you're going through this. I know it's painful as I endured it for 7 years. I've been with my husband for 13 years, but once I started standing up to him, the devaluing began. He's a controlling narcissist and an alcoholic. You deserve so much better and at 27, believe me, you will find it. I'm 62 and there's little hope for me. But, better to be alone than be with an abuser.
Do your homework on narcissism and find a good therapist. Those 2 things have helped me. I'm 4 months post leaving my husband so still have a long way to go. Be kind to yourself. No matter what you or I did, there is never an excuse for abuse.