i really really love her and we have so great time, I don't know what could be wrong and why she wants to be "best friends" with him and why she gets so angry when I mention about this?
Most Helpful Girl
If she can't make you a priority over her EX, then she's not ready for a relationship. I would not continue to date her at this time, and maybe after she resolves her feelings for him, there could be potential for you two to try again. Five months isn't a lot of time to get over a 3 year relationship. It completely rocks your reality when you lose someone after that much time.
As much as you care for her, she's just not in a place to give herself to you right now. PLUS, she may not even WANT to. If she is talking to him everyday, that would lead me to believe that she is still clinging to the idea of them getting back together, even if it is only on a subconscious level (which I doubt).
Where does this leave you? Caring about a person and giving her more than she can give you. You can only give more than you receive for a certain amount of time, before you are all burnt up and have nothing left to give.