I know with all my heart that as you pray to the Lord when your in struggle the Lord will answer you. Turn to Heavenly Father in prayer! As I have experienced myself when serving a short-term mission I was taught it was important to let my companion know how I felt, even when I thought it would be hard to do so. It's actually not hard, it's great letting your companion know your feelings, and it's like talking to a best friend. Your companion will help and guide you, remember we are human it's okay to express are feelings. In a book called "Missionary Miracles: Stories and Letter from the Field" there is a great example of a sister missionary expressing her feelings;
"The Best Day I've Had"
Brazil Belo Horizonte-Mission
This last week was truly a great one. Things have been pretty frustrating the last little while, so we had a meeting with the elders in our ward about how we can turn this place around. Our meeting ended with a desperate prayer to our Heavenly Father to help us and guide us to be able to help this ward grow.
We're truly proud of the accomplishments you've made and that your coming to learn the language easier. As you continue to pray to Heavenly Father that your tongue might be loosened, practice speaking to and teaching others, I'm sure the Lord will strengthen your language skills.
P.S. Elder Boyd's companion Elder Chen asked dad if you sent pictures to us, dad said no. However, now he's thinking ya'll have taken some crazy pictures at ya'lls zone meeting. haha