Still into him...

Okay so I miss my ex. We were only togther for like 2 months but we went through a lot. We had so many bumps in the road but when were still together . What hurts the most is that he gave up on us. Yes I'm only 15 and we did things we were not suppose to and he told my sister boyfriend. No I'm in trouble for a year but I still love him... Should I forget about him. I really don't want to. I really loved him. He still flirts with me sometimes but he keeps his distance. We don't talk much like we use too anymore. I don't even know how to start a conversation with him now... I really want to thought because I miss him a lot...