Ok so here is the deal. One of my friends from college introduced me to her sister about 3 months ago. she had just ended a relationship with her ex whom she had been with for about 8 months. Now after the first time we got introduced, i didnt see the sister for about a month until my friend called me one day and told me that they were going clubing and asked me to join them. Now when i got there the sister was there and she introduced me to this other guy as one of their friends. Since then i have been clubing one more time with them and the "guy friend" was there too. The sister and I have exchanged numbers and facebook info, and we have gonne for dinner twice and im starting to like this girl. Anyways the guy friend's birthday is on friday (in 2 days) and him and another mutual friend who happens to be the person hosting the party, invited me. The sister, who after we had dinner today,i asked her if there is anything going on between her and the "guy friend" and she said that "they are kind off dating but its not serious or exclusive yet" and i fessed up and told her that im starting to like her. Now she is going to be at the party too.
So my question is, should i go to the party or not. And if i go what should i do.
I know that was a lot to read but any advice is appreciated.