Friend
Companion
noun
A friend that you attain is your friend. This is the most common way to say "friend," so learn it if you want to make any!
The readings for both of these are readings you haven't learned yet, though maybe you already know this word since it's fairly common. Think of it this way. You have your friend Tom (とも) Cruise. You like him, and he likes you. You're close enough friends that you can touch (だち) each other too. Like, on the shoulder or on the hand or whatever, without it being awkward. So, you like to Tom touch (ともだち) when you can, because he has nice skin.
彼は私の友達です。
He is my friend.
よかったら、私と友達になってくれませんか？
If you don't mind, would you like to be my friend?
友達の友達から聞いたことなんだけど、ビエトってヤクザらしいよ！
I heard from a friend of a friend that Viet is a yakuza!