So I got together with this guy around 4 years ago right after his best friend broke up with ME. And as to not make this post too long he was a lazy, whiny, for the first 3 years. Finally my neurons kicked in and I left his . After 2 months we began talking again and he said he understood why I didn't want to be with him. That all the reasons I had said (yelled) were true. So another month later we get back together and he has been the BEST BOYFRIEND ever. He's always looking out for me, trying to buy me things (I say trying because I don't like people buying me things other than food), telling me I'm beautiful, saying he loves me, and even in my why moods he tries to make me happy no matter how rude Im being. We had our good times and bad, but I just stopped loving him a long time ago. When we first got together I had an image of him that I admired. But as we grew together I realized he wasn't who I thought he was. He's whiny, egotistical, and just plain UUUUGGGGHHHH. As nice as he is now, I can't STAND him! I always want to put duct tape of his face so he can shut up. And I feel guilty over this BECAUSE he is so ridiculously nice. So 1 little argument later I break up with him. He left the apartment last night, and I can't sleep. I don't regret breaking up with him, but I regret the way I did it because he doesn't deserve that. I don't know how to let him know "Hey im sorry over how i broke up with you but i dont regret doing it because ive been thinking about it for a loooooooooooong time but youre an amazing guy and you'll find a girl who doesnt find you annoying and will love you for you. But I can't do that right now. I want to be alone."

You were with him for three years but it sounds like you were never really in love with him (but instead found him very irritating). I'm still not sure why you got back together with him knowing that you didn't have those feelings for him. Now, he's tried to be good to you and you've turned around and treated him badly. It sounds like you are (maybe unintentionally) playing games with this poor guy.

While I think you should perhaps tell him part of the truth (that you didn't treat him well in the way that you broke up with him), I think you should leave the rest of it out. You don't apologize to someone and in the apology call them annoying and reinforce the fact that you haven't loved him for a long time. My advice, is that if you feel you have to talk to him, tell him you didn't treat him the way he deserved to be treated when you broke up with him. That his turn around made him an awesome boyfriend, but the feelings just weren't there and that he'll find someone that will appreciate him.

You're completely right on all accounts, and I went back with him because I had the feeling he WAS going to be different. That he was going to be mean anymore (The words and y were removed from my question :P) and treat me right. But even thought he did change and all I just couldn't love him. And Ive tried very very hard, and Im mad that even thought I now have a gem of a guy I just can't even like him!
When he returns to the apartment I'll take your advice and talk to him without the other nasty details.

Thank you.