Am I ok or is he trying to make me think that I'm not?

First, I am not a lawyer. You should get a lawyer... assuming you are in the US it is almost certain you can get legal advice for free. Hopefully you have people supporting you?

That being said-- Yes it is OK to be with another person. It is not illegal. In the US people don't get in legal trouble for who they are with even when they are married.

'Course it's not illegal. Your soon to be ex is just trying to screw with your head.

Sounds like you made the right decision on getting out, well done.

As far as i know, having an affair is not illegal
However, that does depend on which country your in.
It is not illegal in most western countries nor in most countries of the European Union, including the UK, Austria, the Netherlands, Belgium, Finland or Sweden.
In the United States, laws vary from state to state. In those states where adultery is still on the statute book (although rarely prosecuted), penalties vary from life sentence (Michigan), to a fine of $10 (Maryland), to a Class I felony (Wisconsin)

In some East Asian countries, including Korea, and Taiwan, adultery continues to be a crime. In the Philippines, adultery is considered a crime. Adultery is not a crime in China, but is grounds for divorce.

In some places, such as Iran and Saudi Arabia,the method of punishment for adultery is stoning to death. (This rairly happens)

In Pakistan, it is also a crime and the maximum penalty is death... but that's not ever happened. People are imprisioned and such though.

In India, men can be arrested for adultury but not women.

(According to Wiki)

BUTTTT

If your simply talking to this man, and there is no sexual contact or what not, you're not having an affair. Most people call it friendship.

Good luck.

A-M

PS (and sorry I was a little flip yesterday) -- your ex has been spending a lot of time trying to make you feel that everything you do and say is wrong.

It is an amazing personal step for you to question that. Congratulations and well done.