something about friends

It was said that friendship is creating between mates. whatever the common destination is people gather together and fight together. the more they stay together the more they know each other the closer they become.
As me with my bests friends.During the time when we prepared the IELTS test, at that time , I was poor in English and very introverted. so I didn't accept any help from others.But after meeting these two person who became my closer friends later. There were something changed.
They really helped me a lot and they made a great way to improve my English. from time to time, they hadn't stopped to help me at all. gradually, i became more and more outgoing and like to talk to others anywhere. my English improved obviously with their help. i 'm sure i can not use English much better now without them. i feel so thankful because of them. they let me change a lot.Of course become much more better than before....