A 23 year old man comes to psychiatry outpatient due to symptoms of occasional sleep disturbances and 'feeling low'. The symptoms staed 2 months back after he found that his girlfriend was cheating on him and was in a relationship with her boss. The patient immediately broke up with her. However since than he has been feeling sad, although he is able to feel much better the he hits the gym. The patient fuher repos that he doesn't like meeting people much and doesn't feel like going to work, although he hasn't taken any leaves and is able to fulfil all her professional responsibilities. What is the best next step in the treatment of this patient?