Should i delete my ex on facebook?

[Rebecca]

I dated him for 2 years we were serious than one day he decides he just wants to be friends. doesn't even really give a reason just says he doesn't know what he wants. I am still friends with him on facebook and I am still in love with him. it has been 3 months since he broke up with me. would if be childish of me to delete him? we don't ever talk he does like most of my post though. One reason I am asking is because he is hanging out with a girl and im jealous even though I don't have a right to be but I am.... So should I delete it? also if I do should I give him a head up?