Hey there. I am so sorry to hear that you are going through this. I myself had a similar situation with my dad and he passed away 3 years ago. I know from my own experience that no matter what my dad did to me or how he treated me that I still loved him & would forgive him everytime. My husband says why cant you just write him off, why cant you just stop talking to him too. But its not that easy for me I would forgive him everytime...I am sure he loves you, how could a father not love his daughter...he may just not konw how to show it or maybe he is just so caught up in his own life that he has put you on the back burner...he must love you & I know you sound like you love him alot.. My advice would be to do what you can to help him...let him see that you will love him no matter what he has done & if you can try to forgive him before he goes...try to talk to him about it before it too late...and you can always still make a relationship happen. also this helped me out alot....when my dad died I hadnt said all of the things I wanted too so I wrote him a letter and put it in his casket, it gave me a piece of mind & I felt like he knew what was in the letter...or you could even give him a letter while he is still alive best of wishes to you & ill send up a prayer for you and your dad...stay strong!!!!