How to get my MacBook Pro to stay on the same network?

Every time I turn my MacBook off or sleep and I open it back up it always connects to our neighbors (who don't have a password). So every time I have to wait to choose our internet and type in the password which for some reason it won't remember. How can I get it to automatically connect to our wireless and remember the password? I hit save password but it doesn't work. Thanks!

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