Raven, nobody is beating up on you because you have in good faith asked a sincere question. But there are perhaps some things you should ponder. I was about to post the same thing as Lily, but wasn't 100% sure because of the transliteration leaves a lot to be desired. Let me show you why:
You said
mudekie. There are 2 cyrillic letters which can be translated as a Latin (English) U. 'y' is ooh and includes examples like the word for
name 'zah-vooт' (зовут) or the cyrillic letter ю in
love 'lou-byete' (любите).
Then there are numerous ways to say the letter E: е ы и э й. The most likely candidates are these three: ы и й.
That letter е is not usually an e except in a few rare grammatical circumstances. Its normal and customary sound is as a 'yeh.'
There is no exact equivalent to the letter i, but the same 3 take the place of it sometimes: ы и й, depending on grammar and spelling rules. My point is this: Its not always possible to take a transliteration and instantly convert it back to Russian.
Rather than talk about the girl who is your girlfriend, let's talk about the girl who is your language teacher. I'm almost tempted to say that if you were my son I'd be advising that you get a different teacher. This one sounds young and very immature, like she enjoys playing the dumb foreigner off on the local population.
If you can find a teacher who helps you build your vocabulary of useful words you can use long-term, you'll have found someone who cares about how you come across in public. A teacher who cares about you will not only teach you how to sound it correctly, but would help you understand the definition and how to use it properly in conversation.
I learned a lot of Russian before living there. But can you guess who continues to teach me the most/best? My wife. It makes her happy to help improve my skills, she corrects my grammar, she helped me with many of the tongue twisters as so many Russian sounds are not 'natural' to the way we speak in English. And she praises me for learning and continuing to learn.
Do you know how many bad words she has taught me? Absolutely none. She cares about how I come across in public. It is not only a reflection on me, but also on her.
Have a talk with your teacher and see if the two of you can come to an agreement to improve the lessons so that you learn for the long term. You'll experience how enjoyable and useful a little Russian can be under your belt, perhaps starting with the Cyrillic alphabet. So, get to it!

Here's hoping she'll enjoy teaching you.
But if not...