Boyfriend lied about deleting his ex gf off facebook?

[Mila]

I dont know what to do, he kept this ex, which he dated for a week (they dated, than after 3 months started dating me), on facebook, she keeps liking his statuses and pictures, and its bugging me..
This girl and her friend called my boyfriend and his best friend to come over at 3 am, and he refused, and he admited that to me 3 months after that happened.

We fought 3 days ago about this, mainly because i was anoyed by her, and he told me about month ago that he deleted her, when we got in huge fight about her, and 3 days ago i found out that he didnt.

He told me that this is a matter of principal, and that I cant command him..

I got so angry, called him, and we started arguing about it, he said "OF COURSE I DIDNT DELETE HER, what were you thinking??".. I was so mad, I told him that i dont want anything to do with him, that we are thru etc etc, he calmed down and told me "What can I do to make it up to you", and i told him that i cant trust him, he has been lying to me, and that we are over. He said "Dont say this..."and he hung up on me.

3 days have passed, and nothing, not a word from him, I deleted him off facebook, blocked on skype, when i was angry.

Its normal for us to scream and yell at each other,but he usually calls the next day... even if i break up with him, he somehow knows he is wrong, but nothing this time..

I dont know what to do, this hurts me so much, and if there isnt this girl everything would be perfect. All the fights we had are about her...

I just dont know what to think
Oh yes, and i found out that his best friend came over to my bfs house with thoose two skanks and they sat on his computer on facebook in his bedroom
We are together 2 years
I know it is facebook, but if he is lying to me about stupid facebook, what is next??