I know how you feel. Last night I ended up going through the journals I kept for the past several years. Looking back on myself, I was pretty messed up. In particular, 2 years ago was pretty bad for me. Literal emotional roller coaster. I would cycle through depression throughout the course of a week. I was so confused and I had no idea what I should do. I needed an outlet for my feelings, which is why I kept a journal. Even though it didn't fix anything, I felt better that I could think about it and write it on a page. I learned a lot from the experience, looking back at it. I can also very distinctly remember each instance I wrote about.
I can honestly tell you that I know how it feels to be in your situation. Just know that things will get better with time. Yes, life will suck. I like to remember this analogy: "Life is like a vacuum, it either sucks or it's waiting to suck." Even though this is true, don't let it keep you down. Stay positive. You aren't ever alone, even when you feel the most alone.