Dog doesn't like walks

So im kindof sad. My dog use to refuse to turn around on walks or go the way she knew was the short walk. We moved. Now we have a huge yard (that she's not interested in) and bigger house and beautiful neighborhood and she doesn't want to go on walks. I can barely get her to the end of the driveway sometimes. We have had some lengthy walks where her spirits seem up (and she seems happy in the house) but today she literally turned around and pulled us back to the house. This literally breaks my heart. She is getting older but idk what's going on? She use get ridiculously excited if I even picked up her leash😭😭😭. Any ideas what she's thinking??? Tia!