Most Helpful Guy
First and foremost, tell him in person. Never breakup with someone over text.
Next, tell him that you two need to breakup, you've lost interest in him, and would like to date other people. Make sure he knows that the relationship is over. You don't want to lead him on.
After that, don't contact him. If he initiates contact with you, be kind, but firmly remind him that the relationship has ended.
Most Helpful Girl
I have been in the exact same situation... I used to like this guy and I had just broken up with my boyfriend. After a few weeks, I told that guy that I had liked previously that maybe he and I should be together because I thought that I supposedly had feelings and that I was ready for a relationship. After a month, I realised I still like my ex and nothing would change that. I would suggest telling him the exact way it is. At least you'd be telling the truth 😊 this is what I had told my boyfriend at the time. That I still liked my ex and that I couldn't move on from him. He told me that it was okay and that he understood how hard it'd be. He let me go and said whatever would make me happy would make him happy. It does pay to tell someone how it really is😊. It will hurt... But it'll turn out right if it has to😊 Hope this helps!