We broke up because she doesnt want an ldr. Now she's "likes" someone else

She told me she might like someone but not love agad. She told me she's decent enough to let our relationship simmer before entering a new one. She told me he likes J. She told me na "this could ruin our chances but yeah". She told our friend na she's stsrting to like someone. I feel betrayed and hurt. I've been crying my heart out these past few days. She was the best but how could she tell me that her liking J would ruin our chances. After all of the promises we made na one day i'll go to her and migrate. After making plans that one day we'll be together. How could she tell me na this could ruin our chances. This hurts so much but I love her so dearly. Im sorry for the order of thought. Im just crying right now and want to vent out.

I don't know what to do and think. Do I pursue her? Do I