how do I stop/distract myself from obsessive social media stalking

Basically what the title says. I'm fully aware that this is horrible to my mental health but I can't help it. Currently stalking a girl that I think the guy I'm into might be talking to and can't stop comparing myself to her just to see that I'm the ugliest most useless most uninteresting person he's ever talked to. I blocked her already but the unblock button is tempting as well