tell her how he makes you feel, and tell her you feel like she wont listen to you when you tell her how you feel. also, please don't self harm! its not good and it can traumatize you. try getting a piece of paper and making cuts on it with whatever you use, and use some red colors to make it look real,you can also touch it to see if it feels real. or instead of cutting you can draw something nice on yourself whenever you feel like doing it agian. i hope it helps!