this makes no sense

I hate a friend. But, I don't actually hate him. I love him, I know I do. But I don't want to see him or really talk to him, and it's been that way for a few months. He has some irritating qualities, but everyone does, and he's still a good person. But I just don't want to. I don't want to lose his friendship either. When I had to be around him for a bit last week, I had to get another friend to walk around with me (we were at a park, if that makes more sense) so I could get away from him for a while because I couldn't stand it. I don't get it, at all. I love him, I do... I just can't be around him and I don't know if it'll ever go away. Why won't it? I want to want to be with him. There always seems to be things that I just can't stand, even if I do not dislike them in the least... I don't know why.

Any advice or similar experiences or anything??

You are not alone! I have a friend that at one time I considered my best friend. We have been friends for about 4 years now. I love the girl the death and would do almost anything for her. But here lately I can't stand to be around her. She drives me nuts!!! We used to be together everyday, and now if I see her for more than a couple hours one day, I am like that is enough for awhile. So you are not the only person this happens to.
Why does this happen? I don't know. I think that with my friend and I, we have grown into two totally different people. Or maybe it is that I have grown and she hasn't, and she drives me crazy now. Sorry I can't answer that question, because personally, I never thought about it.
Just know though, I too feel this way. It is a normal part of life. Friends grow up and grow apart.