I have had trust issues for the longest time in my life. I have been burned so many times by others. I have been burned by those whom I didn't like that much, which doesn't surprise me. But I have been burned by those whom I liked a lot and trusted, including friends and especially family.
I am very shy with strangers when I'm out in public. I can strike up a conversation fairly easily, but it's hard for me to suggest to a stranger that 'we should get together'. I have a friend who can do that very easily. I can't.
I have no advice or suggestions because I'm feeling the same way. I feel like if you already have trust issues, you can heal yourself from it. But then something happens badly then you'd be right back into not trusting. Just my opinion.