welcome to Healthcare Magic.
Alcohol use may lead to development of anxiety and depression
. Your above mentioned problems (worry, social anxiety
, lack of happiness, irritability and dizziness) are common in anxiety and depression.
For treatment first step is gradual stoppage of alcohol. If symptoms resolve, then it is fine, otherwise you may seek help of psychiatrist
It is also better to start some vitamin supplement as alcohol induced vitamin deficiency
(specially B12) may also lead to above mentioned symptoms.
Wish you all the best.
Dr Ashish Kumar Mittal