<human>: Can you succinctly summarize the text in 1-3 sentences?

Long story short, my GF cheat on me last year over 3 months (emotional affair). Now I feel insecure when she repeat the same behavior:

* Change plans out of nothing.
* Constantly says she will come by some hour but she doesn't and later she send a message saying that she will come by later.
* I feel like she is lying to me.

I have those feeling from time to time, is not something that happen every week or so. I've already told her that I doubt on here when she does that, I'm not sure if I'm being overly insecure or my guts are telling me something.

Please help me to clear up my mind.
<bot>: GF cheat me last year. Feeling insecure when my GF has unexpected behavior and I'm feeling horrible thinking that she is cheating on me again.