how will you know if you still love your so called "EX"?

I don't want to know wether I still love my ex or not. It's irrelevant to my decision-making at present.
Why would I ask myself such a useless question?
She's an X for a reason and, if I know myself like I think I do, it's a pretty darn good reason. In fact, there are multiple reasons and each is a good one.

Ask yourself why they have become your "EX".

Great answer!

It reminded me of my last attempt to meet someone in person that ended very badly. I am a smoker, an old school type and didn't want to become intimate just a few hours after we met. He kept repeating that he loved me, but at the same time continued looking for another date.
I told him I am not anyone's option and he got mad, somehow deleted my account (hacking?)and after that blocked my number.
When I found out my account disappeared and tried to text him to ask what was that about he threatened to sue me if I contact him again!?
And that is a man who constantly repeated he wanted a normal and sane person to build a meaningful relationship with while loosing temper every time he disliked something.
For example, I am a smoker and I stated that. If he couldn't accept it why did he contact me to begin with and grab my E-cigarette every time I reached for it to prevent me from using it, followed by a lecture and a tantrum?
That is not tolerant behavior. Lectures are not pleasant, but tantrums are not acceptable for someone over the age of 50.
If I said NO it means NO. Not everyone ends up becoming intimate only few hours after meeting someone. That doesn't make me abnormal or anything else he tried to imply.
This is an example of REMEMBERING why I would rather never have contacts with this person. We may have profiles on the same site again, but I have no intention to ever contact this man again.
Once you learn the lesson there is no need to repeat it. :-)