Dating while separated?

A guy asked me out, and our first date he told me that he was still married, but separated. He and his wife live in separate houses but they're not sure of getting a divorce. I felt like I was basically a filler, that he'll toss once he decides to go back to his wife. Do you think it's fair/okay to date someone when you're separated but not sure about divorce yet? And what would you do if you were in my position?

Dating while separated?
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