Opening up

If you are like me and have blocked your emotions and don't like talking about your feelings with other people then you would know how difficult it is to just change doing that. My friends would rather me tell them what is going on, even if it means an argument just so that they are aware of how i feel and so they know how to talk to me or if they can even help. I would much rather not talk about the situation and let the matters at hand fall on the ground where they are meant to go. My friends, as much as they try, can not do anything about it. They love how i give them advice and that i am a good listener for them but im not sure how i can open myself up to them after shutting them out for so long. I need to figure out a way to be able to open up, but not completely. Just enough so they feel happy with whatever i have to tell them to make them drop the subject. I would like suggestions.. so let me know.