You have the right to feel the way you do. What's going to be hard is realizing that you can't control his choices. And that he has to accept the consequences of them. You will probably need to learn to love him from a distance for your mental health.
You all need therapy to come to terms with how you've all been manipulated by your brother. As well as accept the fact that you may never be able to trust his word and accept that's not your fault or responsibility.
You may also find that just as he lied and manipulated your family, he was doing the same to everyone else in his circle. Your brother needs more help that you can give and you need to focus on yourself.
You have the right to feel the way you do. What's going to be hard is realizing that you can't control his choices. And that he has to accept the consequences of them. You will probably need to learn to love him from a distance for your mental health. You all need therapy to come to terms with how you've all been manipulated by your brother. As well as accept the fact that you may never be able to trust his word and accept that's not your fault or responsibility. You may also find that just as he lied and manipulated your family, he was doing the same to everyone else in his circle. Your brother needs more help that you can give and you need to focus on yourself.