I'm 21 years old, I was in a relationship for almost 4 years and it has been almost a year since my breakup happened. It took me 9-10 months only to stabilize. My health has deteriorated drastically I used to weigh 54 kgs and now i'm 47 kg. My sleep cycle was disturbed I hardly slept at night and woke up early, couldn't focus on anything I did, felt like vomiting and sick at the stomach. All of these continued for more than 8 months. I thought I have moved on but recently I learnt that the guy I was dating has moved on with some girl. This shook me to the core and now all the feelings of stomach sickness, vomiting, dizziness, lack of sleep everything has returned. I even feel breathless at times when the thought of him with some other girl crosses my mind. It feels as if i'm back at square one, i'm scared as I don't want to go through all of that again for the next six months. Please help.