When my ex filed for divorce three years ago, I was both suicidal and homicidal, because I feared I could never find another man to replace him, and everyone else I knew, including my teenage cousins, are in relationships. Heck, I even wanted to do violent things (I won't go into details though, but I remembered making a thread about this a month after he filed). I went to the hospital thrice that year, and the last time, I was put on Abilify, which has since been very helpful, and I wasn't hospitalized since.
I stopped thinking about wanting a man in my life and started to focus on other things; I have expanded my crafty palette and learned how to knit and make jewelry, which made me money. I also took on interests both old and new, such as Pokémon; I started playing Sword and Shield because my mother thought it would be a great early Christmas gift for me, and started collecting Pokemon cards, something I haven't done since seventh grade. I also started on collecting pogs, and am learning Spanish through a book that I bought on Amazon.
While there were times when I felt lonely, I remind myself why I wanted a relationship. My brother, when he was on drugs, told me I would never lose my virginity, which really upset me to the point where I would become suicidal, and as mentioned, I was envious of other relatives and their SO's. So I met my ex online and we got married, but his mental health deteriorated two years in, and it eventually became unbearable for both of us.
Ever since my divorce, I have become more social, and spend a lot of time with my nieces and other relatives, who all said I was more delightful. I am also returning to volunteering; an animal shelter that's popular with my family accepted my volunteer form, and will start training me to work with the cats in mid-September.
So that's my story. I really hope it helps you, and we all hope you make the right decision in going to the emergency room. We care about you, even though it may not seem like it. All you have to do is just take it one day at a time.
While I am not the best at giving advice, I hope this will help you and make you feel even a little better.