I met a guy who I spent a couple of days with in a group environment and got to know him over this time. I felt that we got along well and felt a mutual attraction between us. At the end of the two days he asked for my number and said we should catch up sometime. Later he also friended me on Facebook. How many days would be it appropriate to wait for a call or a date? Also, in this case, should it be his duty to contact me or I to him?