thanks for your responds!
so this is what I wrote to him eventually:

> Hello [his_name], how are you doing?
> This is Nazli btw, [myfriend's name]'s friend. I was just
> thinking about the evening that we all went out to
> dinner, and I thought I'd write you a quick note to
> see how you've been.
> feel free to email me back when you get the
> chance.
>
> Nazli
>
> P.S: So how's studying for MCATs going?
>

and this is what he replied two hours later. Is this a good sign by the way? cause no matter how long he hasn't logged in to his account, he logs in on the same day that I message him and messages me back... he also did the same thing when I added him.

hi nazli,

how's it going? not much here, i have two classes:
bio and chem. just doing a little studying and also
trying to find a job. other than that, not a whole
lot. what about you? wut u up 2 these days. talk
to u later