Can a woman learn to trust you again after you did something to lose her trust?

Consider that I have not physically cheated on her. I was caught looking at dating websites. She forgave me but she thinks that any time that I am on the computer I am on a Dating website. This has happen over 8 month ago and I have not been there since. I love her but she keeps on accusing me. SHe even has a tracker on my computer. She see every where I go. My roomie went on myspace on my computer. She blames me. She thinks its me. I don't want to lose my manhood by telling friends not to go on line on my computer. I feel stupid if I did that. Like I have no ! I put up with her because she forgave me 8 month ago. I love her for what she did. But enough is enough I am not looking for any one else. How do I get her to start beleiving in me? How? without losing my manhood and keeping my dignity!