what should i do

so i was with my ex for a year more or less, we broke up 3 times till things officially ended for good, but she always called me or texted me when she had a problem, which was alot, till i finally told her im not there for her to just come and complains, a month after that she texted me saying she had a new bf, we didnt talk for 3 month till something happened and i called her wondering about something and her bf called me and said to stay away, and then i found out he's just crazy jealous and he told her to cut all the guys out of her life, and that was about 4 month ago, last week she called me 4 times till i answered crying and saying she doesnt know what shes doing and she misses me and how she's depressed and drunk every night, we talked for abit and then she called me 2 hours later saying she broke up and she wanted to meetup, i avoided that cause it was the same day she broke up and it wasnt the right thing to do, since she did the exact samething after we broke up(she went and chilled alone with a guy that we broke up over the same day) but i was worried about her, so i told her tom. next day i found out they got back, but i was worried about her drinking so i texted her saying i wont talk to her again and she should worry but i asked her to stop getting drunk every night, she didnt reply to me even though she read it. i dunno what to do if she calls me again and at the same time im worried about her, what do u think i should do?