First of all, take a deep breath. You're confusing yourself. Clear your head.
In the beginning, did you write down the list of your 180s? What behaviors or actions did he not like about you? Do the opposite actions of those first.
Based on your current interactions, when you are nice to him and do him favors, what does he do? Does he reciprocate? If so, then continue doing them. However, if you are doing nice things for him and he rude and disrespectful to you, then stop them. Simple as that.
Each person's sitch is different and at different levels. You're going to have to gage when to do what. Whatever it is that you decide to do, do it without fear or fear of being judged or rejected. Do it because you want to do it.
Start from there. For the more heavier interactions or to journal, be sure you detail the interactions here.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.