My dog used the behave so good when she was little. Always by my side. Now that she gained confidence, whenever she sees a dog she's gone like a bullet. How can I train her to come back when I call her and to not leave my side? She's a little over 6 months.

What I’m wondering is if she’s getting enough play and social time with other dogs?

You can think of it the same when you were little you were probably spending more time with your parents. As you got to know yourself more and other joys like friends and activities, you naturally started wanting to spend less time with your parents and more with your friends and doing other things.

The trick here is finding out what needs to be your dog has, that you can help her fulfill in order to make it easier for her to then want to fulfill your wants.