Should I text her or not?

So I've been dating someone for a while now and I'm in love with her, but I met this girl the other day and she asked me out, I of course said no and explain to her that I was dating someone. She said she understood but gave me her number any way and told me to text her. She's pretty attractive and has a good personality but I don't want to be any thing more than friends. So I don't know if I should text her. I don't want to lead her own or anything but I do want to be friends so...
Should I text her or not?
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