Tips for actually moving on?

Sigh I don't want to think about my ex-friends anymore. I have to suck It up seeing them 24/7 and not being able to interact anymore. I seriously just want to stop reminiscing about the past and also let go of these grudges... Its in the past let's leave it there. I can't focus on my irl lately and I'm way too addicted online cus of them. Way too addicted that I know who their new friends are so I even immediately avoid those ppl cus I'm that much of a stalker and obsessed. I need to stop this. I just want to interact with people normally. Honestly this obsession would end if they could just be normal around me. I would stop caring so much abt what they do and assume bad things abt them.