I'm journaling about the unlikely continuation of my relationship and how I felt about another girl
Why did you feel like that to another girl?
Just because I was lonely and with her it felt better
While it's great to keep your secrets in your journal instead of gossiping and creating drama, you should have been honest with your relationship. Stalling and making things worse like this is only hurting your girlfriend even more once she finds out that you've been cheating.
My girlfriend made me very unhappy, so I was never honest with her
All I'm saying is that if your relationship is souring, don't you think it's time to let go? You've already found someone you click better with, so why keep holding onto something painful? I'm sure your future would be brighter once you sort this out!