The purpose of disfellowshipping is to bully you into conforming. They want you to feel bad, humilated and depressed and they bank on holding your family hostage so that you return feeling contrite. Take time to think about what you really want and see this as an opportunity to re-evaluate your life and educate yourself about this organisation. Take a breather from the meetings and give your family some space too. You need to recover emotionally from the trauma and facing the humilation and ostracism will cause you to feel depressed and anxious.
You are not a bad person, and you know from your own experience that there are loving, supportive people who are not witnesses who can help you. You describe your boyfriend as a loving and good man and hopefully he can help you through this. You can make contact with people who were friends in the past. People are in general more forgiving and accepting than we give them credit for.
Disfellowshipping gives you a unique opportunity to think for yourself. It is not a bad thing it is a chance to breathe and establish what direction you plan to follow and take control of your life probably for the first time.