Trying to heal but I keep wanting to kill myself

I feel so empty. We dated long distance for over a year, he ended things because he wasn't emotionally okay with dating anyone anymore, and he didn't want to do long distance. Two fucking weeks later, he's seeing a girl that lives even further away than I do. I feel sick. I tried to be the best girlfriend I could, and every time I asked him if he was feeling okay or if he was happy, he always told me he was. He KNOWS I have anxiety and I get worried that people secretly hate me, and he was always the one to reassure me that that wasn't the case. But it fucking was. The person I loved more than anyone in the world, the one I gave my entire heart and soul to, smashed it into a million pieces and then moved onto the next girl in 14 fucking days. Being a person that struggles with suicidal thoughts, it's so hard to know that I can just disappear from somebody's life after being a huge part of it, and they won't even notice. They'll just replace me with someone better less than a month later. He doesn't even care about me, and I don't know if he ever did. I just want everything to end. I don't even know how I could ever trust anyone after this.. I'm so empty. I don't have any friends. I have nobody to turn to. What's the point of being alive? Nobody is ever going to be able to love me again. I think it's time for me to be done.