Olivia, You need a helpful mechanic/DIYer to get under the rear seat or trunk to locate the fuel tank sender unit. If you release the sender unit you will have ready access to the tank to drain it. Please make sure that if someone does it for you that you or they DO NOT use an electric drill powered pump because the fumes from the gas will be ignited by the drill!! If a garage does it or a good home mechanic they could use an air powered drill with a compressor which won't generate any sparks. The option is a hand operated pump of some sort, but please take care and disconnect the battery negative terminal before you start.

Most Honda's have a drain plug on bottom of tank 17mm nut size.