
Yes, it might have started genuine, the feelings of true bonding and the feeling of respect and value for each other may have been there and so you have know when that is gone. Either because you just grew apart or you that when the feeling was just simulated from the beginning. Yes, we've all been there and you are not alone everyone has experienced betrayal and it's a shame when you are being true and they were not but you know there's no productivity if you are just going to mourn about something and fighting for something that you are never going to win.
So move on, get rid of all the people concerned in your life. Set your mind that it's your life, your destiny that you are taking over and it shouldn't be that you are playing a part in their lives, in their movie as a supporting lead. Anyway, if they are anything worth being in your life, they will come back sooner or later but if pride will prevent them it's not going to be your fault. So be open to them coming back but nonetheless be open for them to never coming back again. Like all good and bad things, this too shall pass.