Good but... – Minecraft Review

Okay so don get me wrong I love Minecraft but I have a glitch were I load it up I see all my worlds but when I try to join in to one of them it shows the loading world screen and freezes like that same with trying to make new worlds I know I may have to delete and reinstall but I don’t wanna lose stuff Minecraft plz fix this
Review by the geme king on Minecraft.