after we lost, we got frustrated but we still back to play, is this called "gamble addiction"?
This can't be called a gambling addiction as one can become desperate at any point of time to recover his lost bets, which is quite normal to human instincts.
Gambling becomes an addiction if you do that repeatedly, without understanding the line of extremities.
I think you can call that addicted, a lot of people get poor from it but its also not easily to stop with it if I be honest.
You have to be sensible enough to call it a quit at some point of time.
But you need to realize it by yourself that gambling is wasted money so you need to play with small amounts so you are not losing that much money.