at a crossroad

I don't know what to do. my so and I had our beautiful daughter 3 months ago. I have a 9 year old son from previous relationship and he idolizes my s/o. we have both struggled with drug and alcohol addiction..im in recovery and have been since we got together 3 years ago, while he is yet again in a treatment center, leaving me to take care of our daughter while working a full time job and about to start my internship for school. luckily I have the support of my amazing family who are able to watch her so I can go to work. trust me, I'd quit but need the health and dental for both children. I am at a place in my life where I want more..i want to own a home and achieve financial stability as most of my adult life has been a struggle with mental illness and drug addiction. I want to spend the rest of my life with my s/o but feel although I will be waiting for him to get sober and it will not happen. does anyone have advice on a similar situation? this has been non stop where there has been no recovery and I hate to say that I'm giving up on him. but I am. I want my kids to have a fulfilling, secure ( both emotionally and financially) life.any input would be greatly appreciated.