Is she just reminiscing as you do...?

My ex pisces gf messaged me out the blue about a picture I took the last time we were together, even though we weren't together she stayed the night. I was the one that finished the relationship nearly 2 years ago now & I was sure we both moved on seen as she has been with the "love of her life" for year now she told me :s though she said the same to me at the time. I've not said this to her, nor have either of us said we miss one another she just brought the picture up and I was like oh yeah that was a long time ago, in fact the first thing I asked was how's things? She put okay... What is this girls motive? Or is she just simply reminiscing about us. Is something wrong?? Or am I just looking into things.. She seems confused. & tbh she was the one that was continuously wanting to work things out just weeks before she started going out with her latest. What do you pisces girls think? She has an aries moon btw lol

See now, we've both moved back home & we live very close to each other & tbh I always said to her wait till we're both back home. I sense her bf might be causing a bit of heartache too but I've just kept my distance seen as friends with her always leads to more than what Ive wanted