gravity is a weak force that anything with mass has. A man and the earth he stands on both have gravity, they pull each other towards on and other.
The earth is massive compared to a man (also a lot more mass) so the gravitational force is also greater meaning from our tiny perspective we are 'pulled' towards it.
There are plenty of observable things that show gravity in action, the tides, planetary orbit, solar orbit etc
You can't call things false when you are too stupid to understand them. also, why the fuck do you accept magnets but reject gravity? wtf is wrong with you