What does it mean when your boyfriend adds back his ex gf on Facebook?

[Swaggerific]

My boyfriend and i have been together for a couple of months now, and so far everything is great between us or so i think. Anyways he's been together with his ex gf for a year , cant really remember why they broke up but 6 months after his break up that's when i started going out with him , and we got closer until we made it official went by him twice and hung out around his cousins and had fun and stuff, but anyways with the fb stuff again he would tell me that she would be calling him up to get back together and he would tell her to leave him alone and that he had block her on fb and i checked and he did but right now he added her back and i don't get it , because u would have to unblock the person for them to add u back so yea. This is the messed up part when he was with her he had up in a relationship with her but with me he doesn't, so now that she's added him or he added her back ( smh i really don't know ) i'm sure she thinks his still single , and whenever i would bring it up to him to do something about it he would say no and it's just fb.But what i don't get is if his ashamed of me why bring me around ur friends and some of fam and not just put it on Facebook? when he even said that he likes hanging out with me because i'm a lot of fun to be around Plz help and no rude answers plz

[Ben]

Doesn't mean anything. Don't worry about it.

[Juicy]

Fb ruins pples relationship.. when I delete someone on fb or someone deletes me.. idgaf! But to add a ex g back is NOT!! a Goood thing he's probably thinking abt a break up with u, if he care more abt u then, he wouldnt add his ex back...