How do I get over my ex?

My ex and I broke up just under 2 months ago. I feel a lot of my fears / insecurities about him were realized post-break up. i.e. he managed to get this new group of gay friends and has apparently been sleeping around, tagged in promiscuous photos online etc. We were together for a year and there wasn't cheating etc. but now I feel like a crazy obsessed person. Constantly checking in online, and still texting him every couple of days even though I'm trying to go no contact. I met someone recently who is pretty great and more on my wavelength, but I just can't shake the obsession with my ex. Is there a time when this is supposed to get easier? Is trying to hold on to friendship idiotic? Just really lost.