What does he really mean n want from me??

After 4 months totally off contact with me, finally he contacted me on whatsapp and facebook.

On whatsapp, he only asked "how are you??"
On facebook, he said "sorry for disappearing for a while, how are you? "

I didnt wanna reply him immediately, five days later, I txt him back with very brief msg to say hello n thank him for his care.

I donno why all of the sudden, he finally msg me like that.

Why?? He just wanna said hi— Or is there any motive behind it ?

Does he wanna come back ??

How is anyone except for him supposed to know that?

If he asks to hang out there could be strong chance....