Confused what could this mean?

Feeling abit nervous I asked this guy last time what he was doing for Valentine’s Day he said he went out for dinner. But didn’t say who with so I just said I’m happy for him. So I text him a few months later asking him if he wants go for a drink if he’s single? And he replied back saying ‘ I don’t think we were on the same page last time’ & previously he asked me to meet him a few times before this. Always telling me I’m pretty and stuff. So I’m thinking now is it just for sex he wanted and wasn’t on the same page or he wasn’t in a relationship and I assumed he was? Hm
Confused what could this mean?
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