She used to make me feel like I was everything, but after her ex came back, she became distant. Am I being slowly phased out?

We met before she moved abroad and talked long-distance for about a year. We were never officially together, but she told me she had feelings for me. She used to text me all the time, shower me with attention and affection, and made me feel like I was really important to her.

Over time, I fell in love with her.

Then her ex came back into her life. She admitted they're talking again, and since then she's become distant.

The confusing part is that she hasn't completely ghosted me. She still replies occasionally, so I keep wondering if I'm overthinking things or if she's slowly distancing herself without wanting to say it directly.

Was this love bombing, or did her feelings simply change? Can't even ask this directly to her, Need some honest advice mate what should I do next