scared to commit again

About 6 months ago I got outta a real abusive realationship mentally and physically he pulled a knife at me and basicly kiddnaped me threading to stab our child (I was pregnant at the time ) I was scared to try to leave him again and then one day I had enough and broke it off well the next day he broke in my house and beat me and tried to kick me in my stomach that's wen I had enough and called the cops and pressed charges now I'm dating  my friend who I knew since 2nd grade he's kinda a asshole not to me because I know wat he's actually trying to say he's real blunt and most people can't handle him because of that but he loves my son everytime we talk he always ask how's he is doing and he love me for me he doesn't care I have a mom pouch or stretch marks all over my body he still finds me attractive and won't let me talk down on myself but my only problem is I'm scared to fully commit to him cause I'm scared he'll end up turning crazy . Idk how to let that feeling go cuz we both just got out a realationship were both are partners were fucking crazy so I know he understands wat I'm going thru but I'm still nervous trusting him 100%