Did I push him into her arms?

I'm completely in love with my guy friend and he returned the feelings but I realised it too late. I was out with him and a girl friend of his one day and I asked him if they were dating and he said no, they were just friends. I said to him "she's really nice" and then I blurted out "me and this other guy (who he knows too) have been hanging out a lot... Its about time something happened" he went "oh yeah" and was really quiet after that. A week later he announces he's dating that girl.

He might've dated her anyway but if a girl said to you that so and so is nice then mentions another guy, was I giving him the message that I wasn't interested and pushed him into her arms? Sucks for me because I am.
Did I push him into her arms?
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