Hello, John! It is so interesting that you had a journey. But why do you complain about your companion? A good and reliable companion must be chosen before a trip. I also traveled some weeks ago. I went to Brazil with my best friends. I have never doubted them, we studied at school together. Kate and Andrew always support me and I support them too. I suppose, the best companion is your friend. Even if you have chosen an unreliable partner, you should not argue with him in the country or city you are visiting. This is my advice to you. Well, I was glad to get a letter from you, goodbye! That's an edit so it reads correctly using the style you've used. Some of the sentences you use are clearly translations of ways you say things in your native language, and they would not sound 100% native to an English speaker, but there's nothing strictly wrong with them. I'd write something like, 'Hi John. It's good to hear you had a trip. Why are you complaining about your friend now? Why didn't you get a better companion before you left? I went away a few weeks ago with my best friends from school. We always support each other - so we knew we'd be happy to spend time away together. You should have gone away with a good friend. Even though you had disagreements, you shouldn't have argued whilst away. Good to hear from you, bye!