My ex texted me this message and it really hurts?

The text read:
Look I'm sorry for the way things ended between us i just want to try move on in my life without my past with you getting in the way of that.

He's changed his instagram bio to "stick to the single lane its easier" as well as posting a picture and following loads of girls.
I just feel like i meant nothing to him how can he move on so fast.
I know you will all say block him.
he is blocked.
But I'm just finding it hard to do what he's doing. he's living his best life now and I'm just sad and lonely.
My ex texted me this message and it really hurts?
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