I want to invite my girlfriend to my world so she could visit my fun-fair, how can I accomplish this?
In MCPE, if you are friends on the Xbox (you can get an Xbox app on your device if you don't have an Xbox), your world should show up for her under the 'friends' tab as long as you have multiplayer turned on in the settings, and as long as you are actually playing the world (unless it's a realm or a server... Those work differently). If you are not friends on Xbox, but are on the same internet, it should still show up under the 'friends' tab as long as you have 'visible to LAN' selected under Multiplayer in the world settings. If you are not friends and are not on the same internet, it will not show up until you either become friends or connect to the same internet. Sometimes, once you join a world for the first time, it will still show up every time even if you are no longer friends and are not on the same internet, but I think that's a glitch.