Someone give me tips to get out of this toxic ass relationship

I love him but I can’t be disrespected anymore . I’m crying every week this isn’t normal I’m 21 weeks pregnant & he’s still treating me like shit . Calls me a bitch threatens to cheat on me it hurts he has put his hands on me before too I need some advice / tips to get out of this i just hate being alone I can’t deal with this anymore I’m only 20 years old I just turned 20