Choosing phone over me

My husband and I have been so disconnected lately. We haven’t had sex in months and once we put our kids to bed we hardly even talk to each other. He is so attached to his phone that he can’t pay any attention to anything else going on. I’ve asked him over and over to be more present and put his phone down but he doesn’t. When we he comes to bed he lays with his back to me while he’s on his phone in bed. I don’t know what to do. I feel alone and so unhappy. Help! I need advice!