Написать 10предложений на тему 'the only way to have a friend is to be one”

If you want the companionship of another person at a level that you refer to it as friendship, you have to do things the other person's way sometimes. You have to take their feelings into consideration. You have to be mindful of what they want out of the association. You have to keep their welfare in mind. If you do all that, then you are being a friend, and they will be inclined to reciprocate and be friendly to you as well. 
Sounds kind of soapy, but there it is.