I'm torn between girl x that matches me but I'm not physically attracted to vs girl y who I'm attracted to but barely know her.

I've been chatting with girl x ang I think I'm enjoying it. We've had some nice talks. And I got to know her on a somewhat deeper level. Her ideals, personality, and way of thinking makes sense to me. But I'm not attracted to her physically.

Now I have this girl y which have been my crush for the longest time. She's been introduced to me numerous times by a common friend. And now I have a chance to speak to her. it's kinda like an common secret among her peers that I like her. But I don't know her.

What should I do? I'm afraid to that if I go get to know this girl y that Itll be considered microcheating on girl x just because she might be feel attached after all the interactions we have (plus I've been feeling that she's having feelings for me)

Another things is, I'm afraid that if I go get to know girl y and we don't match, I might be wasting a possible partner in girl x since I kinda have to pick one?