I feel like I am a loser... failure.. I dont have energy for any thing.. I am late for my friends.. what should I do?

I am a doctor.. I was in a relationship for 7 years and then after our engagement he cheated on me and left me for her.. I am 30 yo.. I got depressed and stayed at home for 5 months.. Now I look at my friends success and say I lost everything I feel like a failure and I have no energy to do anything

I feel like I am a loser... failure.. I dont have energy for any thing.. I am late for my friends.. what should I do?
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