Invite all of your facebook friends together to like your page here is some script might help you to do this but remember some of theme did not works for everyone because facebook continue changes it’s algorithm.
Method 1 : Using Javascript Code
1. Copy all the code and open the page and click on invite
2. Press CTRL + SHIFT + K and then paste the code in the console box
3. Minimize browser and wait for few Seconds
Google chrome
1. Copy all the code and open the page and click on invite
2. Press CTRL + SHIFT + J and then paste the code in the console box
3. Minimize browser and wait for few Seconds.
javascript:var inputs = document.getElementsByClassName('uiButton _1sm'); for(var i=0; i<inputs.length;i++) { inputs[i].click(); }
Method 2 : Google Chrome Extension
One of Google chrome extension also help you with I confirmed works very well but make sure facebook only allow max 500 friends to invite at a time.
Get Google Chrome Extension to invite all friends to like your page Invite All Friends on Facebook