How can I get my dad to accept my uncle being gay. I miss him and, i'll always love him no matter what .?

Your dad is going to have to be the one to accept the fact your uncle is gay. You can talk to your dad till you are blue in the face but you can't make him accept your uncle. I just hope he does not wait until one of them is at deaths doorstep. I know it's hard, I've been where you are at, but you have to let your dad deal with this and not force him to accept it, that only creates more problems. If you still want a relationship with your uncle then you should, but at the same time you might not want to say anything to your dad and start anymore problems. Sometimes we can not always talk to people about many things which is sad, sometimes you just have to let people deal with things in their own way and not force your thoughts or ideas upon them. If you miss your Uncle and want a relationship with him then you should do so.

why don't you try and speak to your father first and try to find out why he feels like that to his own brother maybe he is the one with a problem not your uncle