Consequences of Depressio. Please hlp!

I had depression 5-6 years back and it got untreated... Somehow I felt at that time that I overcame it but as days passed and I started feeling more and more low and faced inferiority complex, anxiety, overthinking etc I realized it might be the after effects of my depression.. Now the situation and the condition has become worse... I can't concentrate, do not love what I used to and the worst parts are that I overthink so much and those matters which are nothing.. And can't sleep at early at night,I compare myself with people around me and feel low, facing tremendous inferiority complex. Somehow I have lost my self confidence and started hating everything about myself. I feel that everyone else is better than me in every way but I am of no good. Everyday I keep staring at my bf's ex-gf's profile and think she is better than me... For all these I feel hopeless, can stick to plans I mke to wrk for something. Somehow I think nobody likes me and no one wants me. Losing friends. Please hlp