my first day

Well today was my first day of high school.It was sort of a good and bad day.My classes were all really interesting and Im super excited to get more into them since today we only did intros.I met soo many new people,and it would have been a really great day until I found out something shocking.I found out that one of my bffs kissed my boyfriend when she seen him walking down the hall.I can't belive it !Sigh :( any advice killjoys?I'm feeling really hurt.