Whilst the scenario you describe is one of the most risky for hiv infection, a negative test after one year is conclusive - you are hiv negative. It is extremely unlikely that you will have not seroconverted (turned from hiv- to hiv ) in this length of time.
Also, let's clear up what 'dormant' means in hiv. The hiv virus can be dormant in your body, and this means that no sympoms will be present, and this is long term, perhaps up to ten years (if medication is taken, it can of course be dormant for much longer). However, the virus can still be detected by testing during this time, as soon as antibodies are produced by the body, and this is when seroconversion takes place (in the vast majority of cases, this happens within a couple of months).
So if I were you, i'd put this behind you and vow never again to have unprotected anal sex.

I think you can finally get some rest! Go to sleep and rest, you're neg. You're taking all the right steps to protect yourself. We've all made mistakes in the past. For you, you can close the chapter for good!

Good luck!