Am I considered a slut?

I had sex with this guy after talking with him for about a month. We never ended up going on an actual date. He said he wanted a serious relationship with me and was very attentive in the beginning. Ultimately, we never made it to the date and he ended up picking another younger woman over me who he loves. He decided to gaslight me whenever I pointed out that his actions didn't match his words. Or, whenever I started pulling away from him. He really tried to make me think I was crazy.

Is this because I was a slut in his eyes? I feel depressed because I rather liked him aside from the gaslighting.
Am I considered a slut?
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