Regret over past life. A doc for real?

I came to Delhi to prepare for UPSC exam after quiting my job where I worked for about 3 years. Initially I was doing OK attending classes, doing some basic study but after about 3-4 months things began to hit me. The atmosphere of coaching centres with young students & many of them already in relationships made me realise what I was missing over my last 7 years (including my college). Gradually I began to feel an emptiness which I never experienced during my college or working days . Now this emptiness is shielding my mind from studying . I even got laid to get rid of this frustration. It simmered down a bit but again came back strongly. Now half of the time I'm thinking how I even failed to even date a girl . I'm too ashamed to talk about about this to my parents , who are already burdened with the fact of me failing to qualify this year prelims ( they have been very supportive). Is this some sort of illusion in my mind to escape studying or do I need to consult a doc for real ?