Uniplex:
I totally get it. I've always had trust issues ever since... 4th grade. But I have friends that have thankfully earned that trust and know that trust that I gave them is very important. I trust them more than my family; unfortunately, they have failed to earn my trust many times.
Anyways, I really think that it depends on how deep and bad those trust issues are. Make sure your friends understand that you have really bad trust issues (by the looks of it, it seems like they are pretty bad, considering they are your friends and all...) My thing is that the only way to fix trust issues is to let people in. You may not like the sound of that, but it's true. The more you are holding back things that you desperately want to tell people, the more it's hurting you. It helps a little bit if you tried writing your thoughts down. As wierd as it sounds, I find it easier to put trust in a journal rather than people.
Trust issues take a long time to heal, but they won't heal unless you take that first step and tell someone :)