ex bf anf ex freind troubles please help!!!!!!!!!?

[Sarah Frye]

i have this ex and this girl that used to be my bff but we stopped hanging out and my ex whom i just barely got over him.they "accidenlty" met at a fair and she posted on his fb timeline had a great time their both in rotc and hes friends with alot of them vuss hes in it too that why im afraid if their gonna hook up or what i need advice also since i liked whatever he posted kind off on fb he thinks im a stalker and that i comment on stuff i dont even know about i dont even do that what should i do hes kinda crazy he says he hates everyone even me and cant love anyone but can get a gf but has to be just like him ok please help im the jealous type what do i do??????????????//