I (37M) asked a girl (30F) to be my girlfriend after three dates. She said it’s too soon and is starting to fade away?

I’ve been seeing this girl I met for three weeks. Five days ago on our third date, I asked her to be my girlfriend (I was going to ask on the second date, to be honest but I felt like it was too soon). She said that it was too soon and we’ve only spent a total of ten hours together (which is a long time and ample time to decide if you want to commit). I now sense that she is fading away and I don’t want to be strung along.

Am I being too eager here?
I (37M) asked a girl (30F) to be my girlfriend after three dates. She said it’s too soon and is starting to fade away?
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