Ex girlfriend "checked out" pretty much toward the end of our relationship? This happen to anyone?

My ex girlfriend. (2 weeks ago) and I broke up. I tried very hard to make it work but it came down to her saying it wasn't the same. It wasn't as comfortable as it used to be.

When girls say these things it sounds like she was just backing out of the relationship and letting it die slowly.

We had had issues with the sex not being good then things kind of being awkward because issues weren't getting fixed.

I had hoped having no contact for two weeks maybe she would miss me and want to get back, but I'm starting to believe that's not the case.

I have been having a great time and she's seen it/knows it. Her friend said hi to me at the gym and I said hi to both of them and she looked pretty uncomfortable. But she asked one of our mutual friends how I was doing.

Anyone with an experience similar to this can shed some light on the situation?
Ex girlfriend "checked out" pretty much toward the end of our relationship? This happen to anyone?
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