I Lost My Best Friend and I’m Suicidal Over it

I had a falling out with my best friend, and I’m absolutely heartbroken over it. I’m a complete mess, I’m bursting into tears all the time, I’m losing myself. I loved him so much. I was in love with him. The way I felt for him was a way I never felt for anyone else, and now I lost him. I was scared to admit this but I’m having thoughts about hurting myself and possibly ending my life over this. I just need to be told not to do this, please.