A question about two words

Are farthest and futherest and furthest the same? Just like center and centre, or there are differences? hope you guys can tell me.

woking harder Today, I invited a new friend to come to my place, who I met with on bus on my way home. His name is Jay and he comes from Canada.We had three hours' chat, which was totally beyond my imagination.I was not aware of that we would have so much to talk. what surprised me is he is from the place that I am eager to go, the energy center of Canada--- Calgary. I always want to go study at the University of Calgary,whose petroleum engineering is famous around world.Anyway, he showed me a lot of pictures and told me his stories and experience. I'm surprised at what he has achieved at exactly my age,his life,compared to me, is much more meaningful and interesting. His positive attitude and outgoing personally impressed me a lot. But that's not mean I am upset, I believe that I will find my way someday and I am trying. Hope to have more chances to meet new friends,share opinions and stories. Come on, be brave and the type of taking action.

I am working on my English Hi guys, I am a Chinese college student major in Petroleum Engineering. I met two Canadian on bus a few days ago. I was sure they are the foreign teachers from Beiya middle school, which is a great school near by my living place. So I screwed up my courage to talk to them :"Hello , are you guys teachers from Beiya ?" "Oh, yes,we are. Wow, you can speak English?" Then, we had a short chat and exchange our Weichat number. Yesterday, I invited them to come to my flat. And I regretted it as soon as I sent my invitation because I don't know what can we talk and what can we do to kill time.There is nothing I can do to take my words back. So I prepared some dessert , coffee and some fruit salad. They will come at today afternoon. And I am little nervous and afraid of screw it up. What's worse is my English is not very good. Hope you guys can give me some advice. Really appreciate it.

Need some advice Hi, I am a Chinese. Two Canada friends will come to my flat tomorrow afternoon. What should I prepare (I already made some fruit salad , some dessert and I will prepare some coffee before they come.)and what can we talk, ( I am not a humorous guy and my English is not smooth). Hope you guys can give me some advice. Appreciate it.