Sorry to say it, but you can't know. Even if you were face to face, you may not be able to know unless you are told of it.
You should do nothing. This is probably none of your business unless you have reason to suspect he's cheating on you. But simply writing to a gay friend by email is not cheating.
.The resource teacher can communicate to parents through direct mail and email. The resource teacher can also communicate through parent-teacher conferences
Not exactly cheating but you have the right to be pissed.
Ask Them What They Want
cheating, or maybe he wants something for other reasons
computers can communicate via email , whenever proper set up and connections are available , then through identified server emails will be in communications
they are all connected through the same internet or an line web
You can politely communicate your preference by saying something like, "I prefer not to engage in phone conversations, but I am happy to communicate through text or email instead."
Yes, in most schools, sending an email about questions on a test is considered cheating.
On the contrary, email is (by default) unencrypted, which makes it fairly easy to intercept.
She does not have a boyfriend.