How to regain confidence after a loss or break-up?

I'm trying to rebuild my confidence. It was a short term relationship but I liked it, I waited, planned and prepared for it that's why it hurts. I want to be positive while I'm aware of the reasons and I've wisdom from the start. I just want to be happy even I'm alone again or will be alone forever.
How to regain confidence after a loss or break-up?
1
2
Add Opinion