Help me get out of this situation please?

Okay so I work at a restaurant and I am a cashier etc. this man that always comes in.

came in one morning and he started talking to me, but I was very short bc I was working and then he kept insisting on getting my number.

No one like my boss or anything was around so I could get out of it. I said I was busy and that I wasn’t comfortable, but he was pushy.

Then he texted me and I right off the bat I asked how old he was, he said he is 35. so I said I was 18 (I am 26) he is still texting me and trying to take me out. I’ve told him no already… and me being 26 in reality makes me feel very weird he is a 35yro man asking an 18 year old supposedly out? What can I say? Or do? It’s uncomfortable bc he knows where I work. Help please?

Help me get out of this situation please?
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