Have I just given him a free date with another girl?

Melodi • 19 and in college
I am 19 and he is 20 and he has a friend in high school and he just meet up with his friend and its a girl. Well he just told me that she is going to take him to eat. And she is paying. It bothers me that he didn't invite me and she is a girl. I didn't tell him and I am about to cry and I don't know. We have been through a lot in the past week and now I am losing trust in him. And I love him to death and I don't know what to do!