relationship advice?

My mental health has never been fab but recently I feel like I'm going on a downwards spiral. I've suffered with an eating disorder since I was around 12. Since May I've been making myself sick. This is occupying all my thoughts 24/7, I can't sleep, I feel anxious all the tim and I certainly don't have it in me to fight for my relationship which has not been going too well recently. 
I promised myself if I didn't get better over the summer I would go back to my counsellor but I'm worried what she will do. I don't want any help but I don't want to live with this for the rest of my life like my mum (I'm 17).
Me and my boyfriend have been dating over a year but we argue so much, which I know is partly down to my extra stress. I love him but he doesn't give me that emotional support that I need, I also feel like I'm bringing him down with me but I don't want to make any decisions in this emotional state. 
Shall I ask for a break?
Shall I break up with him?

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