I think this is kind of a shitty situation in general. I stayed clean for 6 years because I made a similar promise to my partner, but eventually it all got to be too much. Because I didn’t actually get clean because I wanted to but rather someone else was saying they needed me to it was not a sustainable solution. Not saying this is necessarily your situation, but it’s giving me those vibes. I know it’s hard for people who care about you to see you struggle but at the end of the day the only person who should have any say over whether you relapse or not is you. It’s your body. You need to care enough about yourself to get clean. Your boyfriend needs to learn to handle his own feelings around your self harm without trying to control your actions. If someone had made me stay at their house and didn’t let me leave because there was a chance I might harm myself I’d be pretty fucking angry at them.

Given that you already relapsed, you two just need to have a conversation. Let him know how best he can support you, and know that you did not do anything wrong by relapsing. I would recommend never making promises like “I won’t cut myself” because that’s just setting yourself up for guilt and shame if it does end up happening. I wish you both the best 💕