Do you guys think he was only using me to forget about someone?

He started treating like a girlfriend after 3 months and confessed “his love for me”. I mean he was going slow and then after 3 months suddenly became fast.

Then when I asked him to just be friends (because he had some red flags and I needed to protect myself) he stopped talking to me.
I had to blocked him because he was cold and I was starting to like him and his attitude hurt me. I was not playing games. I had a successful relationship for 8 years

Do you guys think he was only using me to forget about someone?
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