A girl that I tried to know if she's available said I'm with someone "at the moment"?

To give a little context, I'm a very introvert and shy guy and wanted to speak with a girl that I see in my campus at uni, but she is always in a group, so I made her a little letter to give her personally, and I did! The letters was basically saying "I thought you were very cute and I would like the opportunity to know you" and also had my socials, but also said if it was a no to tell me just to know, she added me the next day I give the letter and she wrote me like "I'm with someone at the moment" and the words at the moment seem very weird for me, my friends and family think the same, wasn't more obvious if she said, I'm with someone dot? What do you think?

A girl that I tried to know if she's available said I'm with someone "at the moment"?
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