What do I do? Please help?

Here's the problem. I'm already dating someone but she's in the military, but there's this new girl who just started at my job and I'm thinking she likes me because she stands close to me with her feet pointed towards me but the problem is she's 25 and I'm 39, but she's really cute but kind of young. The problem is I kind of like her. So what should I do? I mean I work with her. I mean people say age is just a number

What do I do? Please help?
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