I know it’s so frustrating when you really like someone but they’re with someone else and it can really get you down but that doesn’t make you a bad person. Sometimes distance can be good because surrounding yourself with these people just keeps you holding on to something that’s causing you to be upset. Even if it’s rubbish right now, things may not work out with the two of them and if he has loads of friends for that reason i’m sure you’re one of them and i’m sure he sees you as a great person. But if you can manage to work past your feelings about someone there are bound to be other people in the future - even if right now you’re thinking you don’t want anyone else. I’m sure you’re an amazing person.