history: I really am looking forward to seeing if my parents will buy me a dog. I really am looking forward to seeing if my parents will buy me a dog. Why your parents? Can't you buy it yourself_comma_ all on your own like a grown ups?
current: Unfortunately, I have a disability that keeps me from leaving my home so I can't search for one myself. 
next: I am sorry to hear that. I think you should join your parents when they go shopping for a pet to a store