
if you told her you're not a party person, she might have overcorrected and is assuming any/all group activities is too much for you, esp public events. maybe she went ice skating with the other person because she thought you would be overwhelmed socially by a busy rink? you could try talking to her and letting her know you feel a bit left out and would like to be invited to more "small group" activities if thats something youre interested in.