I need opinions on my latest romance

Kristel
Ok so here I go! 
I had a friend (whom I'm no longer that close with) who had a boyfriend and they both got so toxic towards another since they both were addicted to X drugs. 
He had a very loving support group and she doesn't care about leaving her habits.
She always told me he hated me she told him I hated him, I didn't care really cause I didn't like him. 
He was encouraged by his family to go rehabilitate so he did, he is out and he is looking into improving every area in his life, and come to peace with his past, they broke up 4 years ago, and he contacted me and invited me to have a chat, and be in peace, so I went to his family's beach house with his family too. 
And our connection was so fabulous something I haven't felt in a long time, i missed someone in my life to show so much interest and looking to make me feel good and cared for. 
I admire him so much for his rehabilitation process and how he is fighting now to have a good future.
I feel awesome to be close to him, but I don't know how to feel about her... I don't dislike her, I feel sad about her not changing her life, he tells me to not think about her, because he feels he was waiting for a person like me for so long, someone that will surround him with healthy activities and change his environment, someone that won't be toxic for him.
What are your thoughts?

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