Surprise

I have a cousin that is very close to me. She is my best friend. She has a boyfriend who lives in another city. Her boyfriend sent me messages two days ago saying that he wanted to come to our city in order to visit my cousin, but that he wanted to surprise her. So he asked me to set a date and go to a cafe and wait for him. Yesterday, I asked my cousin to go out with my friends and she accepted, but she was stressed. We went to the cafe, and my cousin asked me why my friends didn't come. Suddenly her boyfriend came and put his hands on her eyes. My cousin was completely shocked, and she couldn't say anything for several minutes. After this time she just asked me, " How? How did you do it?" and we just smiled. I think it was a very interesting surprise for her, and I appreciate her boyfriend.

Overall, you did a very good job at getting your point across. If your goal is just communicating what you mean, you are nearly there. You most common mistake was forgetting commas. In many of your sentences, you put two simple sentences together with the use of 'and' or 'but.' When you are doing this and it is two complete sentences you need to add a comma in before the 'and' or 'but.'