Hey Karolinka, 
Since I live in the States and rearely speak Bulgarian besides to my family on Skype, the first couple of days I go to Bulgaria I always end up apologizing in English. If you speak all day, every day your second language (in my case my third) becomes natural like your first one. Maybe the girl leaves in English speaking country ..... When I say :"I'm sorry"  instead "Извинете" it comes out without thinking. After the first week I get used to saying everything in Bulgarian. Funny that I'm at Newark airport right now on my way to BG ..... Hope to bump into you since I live in Младост too.