I Am Lonely

It's been 4 months sense I've broken up with my ex of three years. I don't regret or wanna get back with her, but it's been so lonely, I don't know why....when we were together she would text me all day everything day...and now...nothing. Most of my friends have jobs and or busy with other things. I have been so lonely that it's lead to depression, and I've had that for a week and it was the worst, I just don't know what to do at all. When I'm alone sometimes, I start thinking about what my future holds for me. I'm scared, I'm scared I'll be alone and die alone, I'm so lonely that it scares me.....