I'm sorry to hear what you're going through. You were surrounded with awful people who probably had experienced a level of pain that has made them careless with others.

The only way to combat cynicism is to renew faith in yourself and God. A relationship with one's self and higher power can strengthen you against these kinds of people.

Yes, there will be plenty of people out there who could not be trusted and may mislead you. There are also plenty of people who are kind, gentle, and honest. They're not perfect, however, so you have to begin to develop ways of feeling other people out. Redefine what friendship means for you. Explore your boundaries and when someone crosses them, let them know this. It may help to establish boundaries for yourself as well, as this can be based on how people come into your life and act as friends. Real friendship shows itself in moments of need, so this does involve trust. It all goes back into fortifying yourself to process and overcome the pain that you feel and have faith in God.

No you are not a burden to other people. These other people didn't understand how meaningful your connection was to them and vice versa. They don't see your beauty and your vulnerability but I'm sure, in time, you will find people who see you for what you are. Give yourself the space to heal and I think eventually you'll come to trust again in people. It won't be the same but that happens when you undergo such a traumatic experience.

My heart goes out to you