
Maybe writing a list on the reasons why you need to breakup with him will help your mind come to terms with the qualities that you don’t need in your life. I also like to write down a paragraph of exactly what I want to say so that it’s easier than trying to do it from the top of your head. And then after when you’re feeling guilty, you can look back at that list
If it isn’t working for you, it isn’t working period. Definitely take some time to think about it and weigh the reasons you’re feeling this way, and be honest. If he’s someone you’re uncomfortable around, make sure you have some people close to you there to support it. Ultimately, be honest with him. It’s better to be honest than to let things drag. Good luck, you can do it