His addiction came again

So long story short before I met my boyfriend when he was 20-22 he had an addiction with cocaine and partying after he realized he couldn’t do this he went into rehab and now at 26 he’s been sober until the other day when he sent me this

I was shocked and just overall surprised. One of the things I alway told him was that I didn’t know him in the past and I knew/know him when he’s clean and sober. It happened a while back and he didn’t want to tell me because “I was being selfish because I know you’d leave me” we talked about it and said he wouldn’t do it again and that he’s going to check himself into rehab when he saves up enough money to go to rehab. I told him that during that time we can take a break just to figure ourselves out. See if this will work and just overall so he can think about it. It sucks because he’s better than this.

I don’t want to break up with him because I am so deeply in love with him. It’s been almost 9 months of dating and this is the only major thing that’s happen that’s really made me think twice about the relationship. Logically I wanted to break up with him because I don’t want to deal with it and its a red flag. I just need some and advice and help to see if I did the right thing, or just overall what can I do? I’m so lost and just scared of all this.