Emotions are killing me inside

I'm scared, scared to tell you how I truly feel. What if the answer I want isn't the answer I receive? I fear rejection. They say it's better to have tried then not to at all, but sometimes that just isn't enough. Sometimes all trying does is get you hurt. I really don't know what to do, but I do know is that I don't want to lose you. One part of me says to try, to let it all out and tell you how I really feel, maybe that's what I should do. who knows, it might be for the better, but then again the other part of me tells me to leave my feelings concealed. It tells me that trying is worthless, and then I'm reminded of my past which was nothing but pain and suffering. What should I do? which side do I choose? these conflicting emotions are killing me inside.