Should I tell him I am keeping my options open?

I went on a date with a guy, had a really nice time, he was really chatty, nice, banter flowed the lot. I definitely want to see him again and go on more dates however, I have already planned a date with a different guy. I have a habit of falling too hard too soon, so I am trying to take a different approach and go slow. Should I tell guy 1 I am still going on other dates?

Should I tell him I am keeping my options open?
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