<human>: Can you provide a brief overview of the text?

For background, my ex and I dated for a little over a year. 3 weeks ago we broke up because we went through a rough patch and she didn't know how to handle it and decided that was best. We kind of lost the "spark" so to speak but I figured that it was perfectly natural to go through this in a relationship.

About a week after the breakup she texted me that she wanted to meet up and talk, which I agreed to. She told me that she was doubting her decision and was torn and it honestly seemed like she was taking the break up harder than I was. However, don't get me wrong, I was a mess. She told me that out of respect for me she wouldn't hook up with anyone for a long time.

Now two weeks later, she is in a legitimate relationship with a guy who just transferred to our college. This guy just so happens to be my teammate who i am forced to see nearly everyday. I barely know him but just seeing him makes my blood boil. 

I texted her saying that i would never do something like this to her and that i felt disrespected. To which she replied that she didn't mean for this to happen and that this hurts her because she cares so much about me and its tearing her up on the inside. 

I know that I just need to focus on myself now but in this situation its extremely difficult. Do you guys think that this is just some rebound relationship? How do I handle interactions with him or her? Should I confront him? Should I say anything else to her or just start no contact all over again? Please help
<bot>: Ex is already dating three weeks after our break up.  Ex's new bf is on my team. Is it a rebound? Should I say anything else to her? Should i confront him about it?