I Keep In Touch With My Ex, What Should I Do?

Hello from me, I am a 16 year old boy and I am here to help me or give me advice on what to do. We have known this girl for almost 2 years but we are not in Bulgaria, but in Germany we are from the same city and then we had become boyfriends, but then we separated because I returned to Bulgaria and in the summer when I came to live here we had reunited and almost two months ago she had broken up with me for one reason because she had returned to Bulgaria and she had lied to me that it was for something else but it doesn't matter ... she came back here and explained to me why she had broken up with me and we are leaving recently time a week everything goes okay hugs sometimes and kisses on the cheek normally even one day we were with them, she had introduced me to her mother before and so on, but there is one I do not know if she really likes me and when exactly to tell her ,,