Ok, so Im in love with this girl, I used to be a horrible dirty guy but since I got with her, last february I have been good. Im 21...

However occasionally on facebook I will chat to a girl or 'like' a girls status who I am friends with but have not mentioned to her before and she then gets upset and angry and actually doesnt talk to me for a few days because of this acting as though she doesnt know why I am talking to them and not listening to my reasons - those being I was friends with her so just saying hi etc

what should I do, what is she thinking??