What should i do about a lying "friend" who recently broke up with me?

I had been dating a girl who started out as my friend for close to a year when three and a half weeks ago we had a tearful conversation on the subject that she had to hide the fact fact that she was with me from members of her family which disapprove of interracial relationships.
At the same time, her stepfather had been pressuring her to become involved with a son of a coworker of his.
Claiming to love me but feel torn between her family and our relationship, she said she wanted to tell this guy that she was with someone, but was afraid that it would get a around to her stepfather.
understanding she wasn’t happy with things, I told her to take some time to think and that I would respect and support the decision she would make about our relationship since I just wanted to see her happy.
After thinking it over for three days she decided to end our relationship as boyfriend/girlfriend(three weeks ago to the day), but said she still loves and cares about me and wanted to stay friends. I found this agreeable and went along with it believing that at the other end of this ordeal i would at least have a good friend to talk with.
This was not what resulted. She’s been quiet, barely in contact and despite her claims of love has been quite cold with me. We mostly text to communicate and she’s been unresponsive, and mostly apathetic to what I have to say. She swiftly crushes any possibility of hanging out with “I’m busy” and no more details. now normally it wouldn’t bother me because it would still feel weird to be around me after all that happened.
But before we separated, she had talked to me briefly about “seeing what else is out there” and stated a considerably positive attitude towards befriending the previously mentioned guy introduced by her stepfather.
During the breakup she “swore” to me that her decision to end it had nothing to do with him and was solely to remove a source of stress in her life while still saying she loved me.
Two days ago in a now rare consistent exchange of texts she stated to be doing and feeling very well, is “getting her shit together” and is generally very happy.
Finally i found out today that the two are dating now are seem to be very happy.

So basically, I’m asking, what would be a good way to handle the situation, because right now I am not in the mind to make rational decisions.(Not talking about hurting anyone, just walking into the supermarket she works at and flipping out in front of a hundred strangers)