Everyone cannot be free from stress.
>> CORRECT

Even though good emotions dominate our lives, when we meet difficult situations, bad emotions dominate us and do not stay in our thoughts, but affect others badly through words or actions.
>> Even though good emotions dominate our lives, when we face difficult situations, bad emotions take over, and they not only linger in our thoughts but also negatively affect others through words or actions.

A musical instrument is like a lover.
>> CORRECT

Hugging and playing string instruments such as classic guitars and violins with loving emotions makes my feelings of love many times bigger.
>> Hugging and playing string instruments such as classical guitars and violins with loving emotions amplify my feelings of love many times over.

However, when I play with depressing and bad emotions, the instrument comfort me, and sometimes I cry when I hear the talking of the instrument.
>> However, when I play with depressing and bad emotions, the instrument comforts me, and sometimes I cry when I hear the instrument's voice.

In my case, the violin or classical guitar is not just a musical instrument, it is like a lover I love and have a conversation with.
>> In my case, the violin or classical guitar is not just a musical instrument; it is like a lover I cherish and converse with.