How can I see any good in this person? I am a Christian so hate is not something I want to feel.?

My situation is complicated. I am in the brink of hating someone who was very speacial for me. I fell in love with my life long bestfriend. We were in a relationship and I thought it was serious but everything came crumbling down after he went to Iraq and came back. Today, we know he has PTSD. He doesn't love me, that I know. He wanted for us to be friends and I honestly have tried. However, he has turned so rude and mean to me. I don't bring our relationship up anymore, I don't constantly call him... I maybe call once evey 3 months just to say hello for like 10 minutes. I never cheated on him, and I was always there for him while he was in Iraq. He was discharged 2 months ago and MOVED to MY CITY! He has no family here.But He met some girl online from my city, she kicked him out. So now my family helps him. He seems uncornfotable with my presence when he is at my house . I can't see any good in him anymore. He acts very careless, no consern for his family, no gratitude to my parents.