I want her back, but she sends mixes signals.. Help please!?

[Alex]

My ex gf after 2,5 years was interrogating my friends about me at the party I was with them. Why would she do that? She does as if she's very happy and over me etc. (She dumped me btw) she was asking how I was doing and if I thought it was difficult. My friends said well you fucked it up bcos I did everything for her and she went quiet..during the party she didn't look me once in the eyes, when I looked i could see her eyes avoiding me

Also on social media she puts since we broke up lots of 'extremely' happy videos and pictures..
She really brings the message that she doesn't want me back, but I have a bit of mixed feelings. Like she was over me within 2 days..

(We were together for 2,5 years, had something really special. Best buddies, although I did everything for her and loved her a lot.

[Mooshi]

Evidently whatever feelings she had for you wore off. She probably made up her mind to terminate your relationship long before she did but didn't want to hurt you. She cares about you but doesn't want to see your pain.