How can I get away from all of these clingy people?

[Tuador]

For the girl, maybe she just misses you a lot. Like a lot. Maybe if you guys were close then she feels a void when you're gone. To be honest, i think you're going to have to confront her about this. It's the only way she'll at least understand that you're serious. If she denies it or reacts badly- then you need completely avoid her. Block her, delete her number and be careful when you move back.
For the guy, block his number.You don't need to be subjected to all of that nonsense.