Salim likes to have coffee. He has begun to consume several cups of coffee even when he has nothing much to keep himself busy. He says that coffee keeps his spirits up by alleviating boredom. This indicates that Salim

Salim has (already) become addicted to coffee

Explanation:

Addcition is one of the challenges facing various people all over the world. This is defined as the condition of being addicted to a particular substance or thing over a given period of time. There is usually lack of will power to control the addiction.

For Salim case, since he has began to consume several cups of coffee despite the fact that he has nothing much to keep himself busy shows that he has become addicted to the substance-coffee.