Girls, Could she want sex? What does this mean?

So one of my girl friends, We've been friends for about 6 years now & About a month or so ago saw me in my boxers but I had her in my house last week and she straight up told me she felt comfortable seeing me in my boxers and said I could take my pants off around her whenever I wanted and she would be fine with it...

I responded with "uhh okay" being very confused and she just giggled and we moved on with what we were doing... Since then I've continued to think about it and don't know what to do? Any advice?
Girls, Could she want sex? What does this mean?
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