What if I'm still in love with my ex?

I'm still in-love ith my ex but he has already moved on, what should I do?

I know how you feel, its a terrible situation.
But to tell you the truth, time is on your side. The best thing to do is stay positive about the whole situation. I personally don't see how people can say they care so much about someone, and move on just like that. And knowing you haven't moved on, to me, makes you the bigger person in the relationship. Shows you actually cared. I honestly hope the best for you and I'm really sorry that you are going through this.