My first instinct when I read your story is the guy is a fraud
who is simply giving excuses to buy time with you until he finds
the right girl after which he will "heck"-care about u. However,
you posted subsequently that you have betrayed his trust before,
and other possibilities came to my mind. Maybe he still needs time
to get over your betrayal OR he may simply be using this time round
as his revenge to get back at you.
As there seems to be multiple scenarios, and I'm not this guy,
therefore I don't know what's going thro his mind, I'd have to
advise you to follow your heart then. If you feel that his contact
with you now is genuine, that his care and concern for you is
genuine, and you still want him back, then you have to continue the
waiting game. And if that's the case, you better banish those
images of him "doing" it with the old-act-cute Cyndi-Wang (BTW,
what's so good abt looking like Cyndi? She has the look of a S L U
T) or you'd feel like you're in the dump most of the time, and
that's not good for your mental/physical health.
On the other hand, if you feel that his care and concern for you is
just routine, without the passion, then you should seriously
consider putting him into the friendship category and stick to that
decision. You don't have another one or two years to wait for
him...you're not getting any younger, you know. 
If
you don't let him go, the next guy won't come along. And who knows,
the next guy may just be the right one yar.
It's your call from here. Good luck!
