I guess it’s totally normal that you spy on your ex for a time, your break up
was relatively new I assume, don’t get me wrong by spying i mean her social media handles, anything above that its something you should stop.
its just a phase that will get over soon.
try distance and distract yourself with meeting friends, doing some activities, or pick up a lost hobby that you always wanted to do, and see it to finish.
with time the feeling will be over and you will find the right person for you....