How can i get my girlfriend back?

Damn bro that's a hectic life you got there! But first of all stop drinking. You think your baby's gonna appreciate a father who was a drinker? Someone who got arrested and came home drunk. At least become a good man so your son's first impression on you is good. And as for you getting your girlfriend back, prove to her you won't make any type of idiotic mistake again that causes fighting and drinking. Do something that will bring you, your girlfriend and your son back. But most of all if you prove to her you'll stop drinking, I'm sure she'll take you back. However, if you commit the same mistake again she'll dump you for good. So be good! And its good take your anger out by boxing. Once again, think about your child's future. Therefore, you will have to mend your mistakes and become a good father and boyfriend. I know you're young and you may want to become out of control, but you should do it to a certain extent where your girlfriend won't have to call the police. I hope I helped :)