I miss my mom so much! I dont know what to do!?

My mom and dad have been divorced for years now.My mom moved 3 hours away a month ago. I live with my dad now but I miss her so much. I never get to go up and see her because I have school and stuff. i miss her and I feel so bad because she was crying about how she missed me and my sibs. I'm crying right now. I dont know what to do. We always fight when were together, and we make eachother so mad. I miss her so much and I don't know how to cope. I don't have anyone to talk to. and she's gone for a few weeks on a buisness trip. I need my mom more then I realized. We never talk really just small talk really. Please help me.