X g f trying to come in my relationship please read !

So my mans x g f keeps bugging me and trying to get through to him through her friends Facebook n it's drivin me crazy she hit me up after months of telling her to back off trying to say she needs to be cool with him and she wanna talk to him this and that but it made me feel like I should talk to her for some odd reason but I know it's not a good idea isn't that dumb for me to think that way... They was together off n on for three yrs we been together six months but really now ---- 
Would u wanna chill with your mans x g f ???? How does that make y'all feel