How do I navigate this

My ex broke up with me after moving to a new country 3.5 weeks ago. We haven’t spoken in 3 weeks. I sent her a happy holiday message with no lose ends for conversation. She called me afterwards. It’s shattered me. She is just in lala land in this new life. She knows she’s hurting me and she feels bad but doesn’t want to change it. She says she misses me but just doesn’t want to do it. Says she’s barely speaking to her family.

I loved this person, and I still do and I am proud of them for doing what’s right for them. But damn today hurt. I said I wasn’t sure when the next time would be we spoke and they said they hope it isn’t this long again. But how can I move on if I’m talking to her. She’s in this new environment she has distractions. I am back in the bed she left me in. She said she just wants her best friend I said I can’t be your best friend I’m in love with you.

I care for her a lot, and I wish I could be apart of her journey while she’s away. But she chose, and continues to choose everyday to not be with me. Any tips? I am so depressed and trying very hard to work on myself. But the thought of her just doesn’t leave my head. She’s always on my mind.