I don't think I can last another summer break with my daughter.

Single mom here. Divorced. I have 12 year old with shared custody. I have primary custody and her father is away for most of her visits (re-married traveling businessman). I have our child 60% of the week.Her father makes up his time by showering our child with presents and no rules when he has her. Yesterday, she ate candy and cookies all day. When I got her back, she was dizzy and sick. She was up late with stomach pains and didn't sleep. This is a usual Sunday night.Anyway, our child has learned that dad is the "fun" parent and mom is a "chore". I have rules over at my house including a strict bedtime, chores, and no internet usage (she was caught at dads chatting with a grown man). Since she has these rules, she has decided she hates my house and lets me know every chance she can. I do let her have a TV in her room, an XBox, Playstation, and I believe this is generous. However, she plays me and tells me she hates it here. I do work part time. In the summer, I have a full day with her. Sometimes 4 in a row. I try to get her to go outside and she usually just wants to sit in her room and complain about how bored she is. Sometimes, she follows me around and tells me how "stupid" everything I recommend doing is as I try to work from home. By the end of the day, she is in my room complaining about how much she wants to go to dads where she has her chat rooms, tablet, and can eat as much junk as she wants. She will say this indirectly by telling me things like "Are we poor that we only have cable internet? I want Wifi now!" and "Dad gives me ice cream and pop for dinner.".A few weeks ago, she tried to run away. She told me she is sick of doing her own laundry and started packing a bag to leave. She had a solid plan to run to the neighbors while I was asleep to call her dad which led me to sleep in front of the door all night when I had to work the next morning. I have tried counseling with my ex but he lies to the therapist right in front of our child saying none of his parenting is flawed. This gives her more power because she sees she can play us against each other. Our child takes his side because she wants the unlimited Wifi, junk food, and he even just bought her a new puppy to keep her closer.Any ideas on what I can do here? I am single working part-time and a lawyer would take all my savings. I am still paying my parents back for the last time we went to establish custody. She would most certainly choose dad to live with. Can I change her attitude? If I become more strict it will get worse. Help? Thanks. via /r/Parenting http://ift.tt/2qwadWI