My ex and i have recently strted talkin again after he broke my heart.i think im fallin for him and i dnt wana?

my ex and i have recently strted talkin again after he broke my heart and left me for someone else while i was pregnant so i decided to give the baby up cuz ima teen .now about 6 months later he has been talkin to me for the 1st time.. we hang out today and i think im fallin for him and i dnt wana becuase he hurt me soo badly and i dont know what to do .. tell him to go away or fallow my heart and keep on talkin to him? helpp!!