If you just click ‘like’ at the top of someones page it should ‘like’ the page. As for inviting your friends, you need to be under your personal page to do that. When you’re using facebook as your personal page, go to your cake pages website. Right under your cover photo you will see a ‘message’ option and next to that is an arrow. Click on the arrow and it will give you the option to share or invite friends. It won’t show the option to invite friends if you are using facebook as your cake page but will if using it as your personal page. Hope that helps.