Search Results: dating sister''s friend

A few years ago, I became friends with this nice girl at work. We meshed really well, and we had a mutual interest. But she had a boyfriend and a very young son.
Within a year, they split up and she started coming onto me. We expressed interest in dating, and we set up a date. Unfortunately, she stopped responding leading up to the date, and messaged me a few days later that she had some issues with her ex and that's why she didn't respond.
We set up a second date, and she changed things the morning of and said she'd actually meet me at the place because her sister wanted to come. With no time confirmation, I was at the place at the planned time and she wasn't. By the time she responded, I was already home. I felt stood up and said as much because she thought the situation was funny. I asked if she actually wanted to persue anything and she said she couldn't answer me at the moment.
We haven't talked since.
It's been a few months, and I messaged her to. follow up with her and ask how she was doing. She responded saying she was doing good. But asked how I was doing and if I had Playstation.
I told her and responded and she has yet to respond.
Is this a good sign? Or should I be cautious? I feel like she stood me up before