So good to hear from you again, I was wondering how Berlin has been treating you! Mach Dir keine Sorgen wegen Deinem Deutsch. Du hast noch genug Zeit, darin perfekt zu werden. Bis dahin genieß' das Leben. Hast Du schon eine echte Berliner Currywurst gegessen?

Also - somehow I can say this better in English - your housemate and her passive-agressiveness just plain sucks! It's totally not fair to tell you she has issues with you but won't tell what they are. How the hell are you supposed to know what's bothering her? I'd call her on her shitty behaviour.

Dir ein schönes Wochenende!