Didn't think I'd find myself back here but she came back after 2 years 🤣

Context: she ghosted me out of the blue on a random weekend after being "emotionally unavailable" for our relationship. After that I took a small social media break for a couple of months and came back on new year's eve 2023 to find she'd posted year review pics with her ex which suggested they'd got back together for quite some time, mostly likely right after she'd dipped on me. I already had my suspicions of that before but as soon as she saw I'd viewed them she deleted them real quick and filtered me off her stories, then probably reposted them afterwards lol. I didn't even bother to say anything and just focused on moving on. It wasn't easy coz we had known each other for 10 years and her absence was felt for a long time. Anyways I was peacefully scratching my butt rewatching Lost when she texted me the other day on a new number so casually like "Hey it's ***", like nothing had happened. I indulged for a bit to see where tf she was going with this, especially after I'd already made my peace with never hearing from her again. Then she finally sent this. Her having "no explanation" kinda defeats the purpose of me hearing her out in the first place so I don't even know what to do here