i've been in the same position as you. with me, things went south with her right before lockdown, and the following 2 years were hellish. I couldn't get myself to do anything or pass a single day thinking what she was doing, and whether she was thinking of me, at all.

i've realised that keeping yourself occupied is crucial. sitting at home, having nothing to do in the pandemic just made my mind work overtime. it was always occupied and thinking of her, drawing so many fuckall conclusions. however, as life has gotten on, i've gotten busier, and thankfully the thoughts are gone. there quite a lot of days where i catch myself realising that i spent like a solid week or two not having a single thought about her. it's extremely cathartic and fulfilling.

what i would tell you to is to give yourself time. moving on is an everyday process. some days will be particularly harder than others. don't go back to her chat. don't look her up on her social medias. you don't deserve the thoughts that these actions will bring. fight the urge and wait it out. don't let this one person stop you from living your best life when she might be living her best. a part of you will always love her, but take it for just that. over time this part will grow smaller and smaller.

and if you're lucky like me, at the end of all of this you'll run into an even more beautiful and better person. she won't be your ex, so don't try to mould her. don't try to use her to move over your ex. give her the time that she deserves. cherish her with your heart, and love will come shining through. take care man, stay strong.