I love my ex and I don't get what he's trying to do.

About a month ago I broke up with my ex I didn’t want to I felt like I had to and I did it over the phone while I was in the pub :o. I broke up with him because I felt like a iahd to we had a very strong relationship we had been through a hell of a lot together and have supported each other very well. When I broke up with him he started screming and shouting down the phone at me and was then crying because o how much he loved then instantly I wanted to get back with him but he didn’t want to because his idiot of a brother kept making him hate me! He now has a new partner but I know he still like me because I’m friends with his sister and he told her. Everytime I’m at the house he comes up and talks to me about his weekend and I’m not sure why he does it because I’m the only one of his sisters friends that he has ever spoke to apart from saying hello he doesn’t follow them upstairs within less than two minutes to tell them about his weekend like he does me. I am really frustrated because I’m not sure what he is trying to do and I don’t want to jump straigh into another relationship because I still love him and he is always on my mind can someone just please try and tell me what he is playing at and why does he keep telling me he still cares about me and nearly making me cry? because I’m so happy to hear it. Just tell me what he’s trying to do and how he may feel about me PLEASE!!!