How do you breakup with a guy nicely. I never wanted to go out with him but my best friend forced me to say yes since she's managing him. He's annoying and only talks about himself and it's sickening. He's also too clingy and wants me by his side 24/7. What do I do?

By how you describe him, I can see why you guys dating is not a good idea, so breaking up is the right thing to do.

The bad news is it is always going to be awkward. That's why going out with people because your friends pressure you into it is a bad idea.

I guess the best advice I can give is "imagine if someone was breaking up with you. How would you want them to tell you?".