Minecraft launcher Bug - Just Loading and Loading...

(Sorry for my bad English, im from The Netherlands)
Dear Mojang,

If I start te Minecraft Launcher it says: ''Loading''. But then under my name it says: ''Loading versions''. And I can't click on ''Edit Profile'' or ''New Profile''
And I can't click on ''Switch Users''.
I fixed it with starting Crafting Terminal (A Automatic Minecraft Mod Program) But then I lag! I don't now if it's a bug or something else.
But fix it for me! I don't think that i'm aone with this issue!

username: Loekaa.
Minecraft Version: 1.8 Optifine HD_U_D5.

If you wan't more Details, just say it, than I make more screenschots!
Again sorry for my bad English :/
Sorry if I do something wrong with this Create Isseu. If I do, just say so!

See you later!
-Luca Kessing