Let's see what you've got
I looked at your profile and did not see any photos you have posted nor a list of your equipment. So I cannot gauge how good a photographer you are and whether you have outgrown the D7000, but it is hard to outgrow a D7000. So, my advice is, learn the ins and outs of your D7000 and you will have years of good use with it. If you do not have a good zoom, I would recommend just getting a good zoom for it.