How do I get over some guy that engaged?

he stalked my social media accounts for months before I finally reached out to him since my curiosity was tingling. So we did sext and talk for many months. I knew him from my old highschool from 10 years ago so he wasn't a complete stranger. I lived abroad because I was still on my working holiday while he was in Scotland so we didn't meet up. I kinda fell for him because I thought he was my type of guy. We would mostly tall at the weekends since the time difference was 5 hours and I had work. I found his facebook and he got engaged to this girl only just last ocotber. Right now I'm struggling to get over him
How do I get over some guy that engaged?
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