Shay, I'm with Krista above. Do send to other agents. Non-response after repeated nudging doesn't always mean "no", but IMO it does mean you are free to query anyone else who might be a good fit. I know your stuff, and by now I'm 110% sure you're ready to take it to the next level.
When I was agent-hunting, I made an Excel spreadsheet with my A-list "most-wanted" agents, what I'd sent to them, in what form, and what date. Also entered the results when I got 'em -- no response, send full, or no. I did the same thing with my B-list agents and worked through what I needed to on that list. I kept these names and results on the same spreadsheet and also a "worth a try but probably a non-starter" agents as well. It helped keep me on track date-wise and helped me move on if my submission was completely ignored, which many times it was.
HTH.
May your work find favor!