Metta Meditation

Truly, you cannot actually get rid of all your negative emotions. Yes it is healthy to release them some and not keep the bottled inside. But what about when your mind suppresses events and thoughts (maybe even emotions if you believe emotions come from the mind) from you so that you have no conscious knowing of them? Personally, I know how it is to do this, but as I said it will take more than a meditation to get this done. And even with love, it takes more than meditation to find it. And I would like to know how you go from this can be done in one session to it will need to be done over multiple sessions.