Ex girlfriend

My ex girlfriend and me split up two months ago, following that there was a lot of up and downs over these last two months. Recently though, we had been talking absolutely fine, we mentioned about meeting up and things seemed to be going well. I last spoke to her on Wednesday as she initiated a conversation with me but the next day she completely cut of all contact. I have no idea why at all and am so confused. I can't think of anything that I said to make her do this. I have a chance to see her on Sunday at a running race that I know she is doing as am I. What should i do? Should I try to take her to one side and ask her why she suddenly did this?

It might be better for you to simply wave hello if eye contact is made. Simply focus on yourself. There could be a number of reasons that she is giving you mixed signals.

This is one thing I can think of that might have caused this reaction. If our last conversation she asked what I'd been upto that day, so I told her and mentioned that I had been out to lunch with a friend. Maybe she thinks I'd met up with a girl for lunch and that I've moved on. Which isn't the case. I adore her truly