Why do people always find a way to ignore or hate me?

All people do is find some way to hate me. I just dont get it we'll have a great time and then they hate me or dont remember me and then hate me cause i was supposedly stalking them. I know im not the best lookin guy or the worst, im kind of fat but i playd football for the last few years so its not like i sit on my couch eating cheetos and watching cartoons all day. So wats wrong with me?