Kissing a friend – what to do!?

So kissed a good friend of mine on the weekend when pretty worse for wear. Felt really bad the next day as she’s apparentyl quite keen on me and wants to take it further. Said the enxtg morning I was sorry but I jsut saw her as a friend.
However she’s asked me if I want to go round to hers and she’ll cook for me this weekend. If I say yes she may read in to it, if I say no it might make things awkward, espeically as I’m not up to much this weekend and she knows this.

What would you do!?