What do I do about my relationship ?

Hi I'm in a bit of an awkward situation. Ive just split up with my boyfriend of 8 months and need some advice. I'm at his now as we tried to have a chat to clear the air but im not sure what to do. Whether to just leave it or try to continue with our relationship. He's just gone out and bought a dog which I have a phobia of and it just seems like he's moves on but he asked me to stay the night so I'm getting mixed messages. I love him and would like to sort things out but I just don't know how to now he's decided to move on knowing I have a serious phobia of dogs. He does drugs as well which is the reason we broke up and he's not to sure whether it's worth sorting out but he's kept all my cards I sent him and they are still up on his room. I just don't know what to do. I had a panic attack in my sleep last night and I'm really hurt by our break but I don't know whether to just leave it and get over it now.