Hello crazyheart.
Just to tell u my opinion. I do feel that u should perhaps start
by talking to her again. Maybe if u are not too ready to go to the
main topic of dating her, u could try by initating a small talk
like "Hey, hows your day?" and see how she replies, and try to
continue the convo.. Maybe after a few times u and her have "warmed
up" a little, try asking her out. Whatsapp or call is up to u, if
she still hv feelings for u no matter which method (as long as not
too rude) she will agree. If u know her schedule it would be best,
just in case u ask at a wrong time and she's not free and u
mistaken it as rejection. try to ask around, maybe get some info
from the mutual fren u spoke about. Hv a small tea break at some
random cafe with not too many ppl, chat her up, and tell her the
truth and look at her in the eye when doing it and ASK HER TO BE
YOUR GF.
Or go out to watch some movie tgt if possible, preferably funny
ones so u guys will hv more common topics and happy
moments.
As said u must act quick in case some other random guy take the
chance from you and u can only regret for the rest of your life. If
there are other "hunters" out there at her workplace they will
seize the chance to make her their's.
Those are my life lessons as till now i'm still in regret.
Good luck mate.
StarryLight11