Dreams ?

I keep having dreams about my ex boyfriend I wake up sweating and really sad wanting to burst into tears I miss him so much it almost feels unreal .. It's like my mind is chasing after something it will never get back ??? and all I have is memories of him I just wish I could see him again and be able to talk to him but he doesn't want anything to do with me and it hurts ... I feel like I lost apart of me but no one understands ?? just shows how much you can really love someone and I still love him deeply I just can't get over him ????