Imho since you have never met any of these people (neither then one you are "dating" nor the ones you are "cheating" with), it is safe to say you don't really have an affair and you don't really owe anything to people whom you have never even met.

Talking to people online isn't really "dating" imho.

i suspected you are very young and I was right. You are 16.

Do your parents know what you up to online? I am also concerned that you said you drink alone in your bedroom. You shouldn't be drinking. Where do you obtain alcohol? Again where is your family in all this?

I am concerned about your safety: talking to ton of strangers and drinking...

Are you seeing a therapist/counselor?