My ex bf told me he likes someone else now

My ex and I had a very messy breakup .. We were very good at first.... But in our 3rd year every thing changed.... He started to drink and after drinking he used to verbal abuse me. And tortured me with his crazy verbal abuses.. Then I had enough so I broke up.. Then now after showing how he can only love me.. Nd can die for me.. Nd begged to not throw him away and nd told me to give him another chance... But suddenly he told me he likes another girl now.... I'm devastated now I cried 3 days straight. I broke up because I had enough but I still love him...the news was so shocking for me..What should I do now to forget him... I'm totally alone now...