I'd like you to correct my diary

Today, I woke up a bit late, but I managed to go to class in time. However, the class ended up  being cancelled because the teacher was not feeling well and was at a medical center. So, I prepared for next class until it started. During the class, I was so sleepy and even numbed from sleepiness. So, my brain didn't work and I couldn't speak English well.
At night, I talked with my boyfriend on the phone. These days, I really am depressed and frustrated by thinking how poor my English is, but talking with him relieved my uneasness. It was not that he gave me a proper advice, but just talking with him made me feel that I don't have to be so negative and depressed. He is special for me and is the one that I really want to treasure forever:)