I am starting to have doubts about my relationship after recently catching up with the girl that got away. Even though things are going well with my current girlfriend.
That's complicated. What did you and the girl that got away speak about?
I started flirting with her after I caught up to her on facebook. We are catching up to eat lunch soon.
It is ok to have doubts about your relationship. However, meeting up with someone else you are interested in while in a relationship is wrong, it is a betrayal of trust.
I don't care, I want to go eat lunch with her.
But do you care that you are hurting your current girlfriend to be eating with someone that you are interested in. You need to either work on your relationship or end things before you start a new one.