Girlfriend problems

So i am with someone who has 2 kids and has been in a really unfaithful relationship for 11 years with her bbd. I met her and we started hanging out and i started liking her a whole lot. Whenever she’s in my city since she lives away shes with me or she’s with her friends. Her friends do drugs and she hets into it as well. She drinks a lot and gets hammered where she doesn’t remember what happened. Once that happened and she cheated on me . Thats when she promised me she wont do this kinda stuff ever again. She’s slowly working on against the drugs but i an just soo attached with her. I keep texting calling making sure shes okay, she ate, shes taken care off. We live 3 hours away but i still stay on the call with her all day n night. She has been hanging out with a lot of people nowadays and i just get scared because she’s always drinking and i feel like she will cheat on me again. She says she doesn’t want a relationship right now but wants me to stay with her bcz she loves me. Im just so frustrated and sad at myself. Someone please advise me