Hello Dabrat & welcome.
This reminds me of a couple of films I've seen: You've Got Mail & a Christmas film.
In both cases there was confusion over identities, but all turned out well in the end.
I do wonder, though, in real life, whether that is always the way. I just can't help but feel that things may be different when the people concerned meet in person.
Anyway, in your case, I would really suggest that you just be yourself and see what happens. After four years, you know each other, without knowing each other, so a flirty first date scenario sounds a bit odd to me, too.
I think that the friendly hug and relaxed chat is the best way to go. If this is going to develop into a real relationship, quickly, you'll soon know ~ just let it develop naturally.
Those are my thoughts ~ what you do will have to be your choice, but good luck and I hope that you will both have a great time together!
By the way, can I please check that you own the copyright to your avatar image, please?
Thank you!