<human>: I had a Facebook conversation with a girl I used to like 5 years ago, but not anymore. I was in a relationship with another girl since 3 weeks when this conversation happened with the girl mentioned above:
(she could not send me some messages on FB due to an error)

* Me: Facebook probably wants me to see you sad.
* Her: Then make me happy. :)
* Me: Do I have a reason?
* Then topic has changed to school stuff, said goodbye to each other, and did not talk ever since.

(Ex)gf found the conversation 2 months later, said she can't trust me anymore at all. In response, I blocked the girl on Facebook I was talking with, gave my (ex)gf my FB password, did not talk with any other girl at all. She could not trust me still, then we later broke up.

I'm getting mixed opinions about this situation and I am really curious about yours. Is this counts as cheating? Can I be labeled as a cheater?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Texted with a girl I used to like years ago, not sure if I count as a cheater or not.