to break up with boyfriend?, or to not? Options

[juliette]

Hi, I hope everyone will be patient and read this because I seriously don't know what to do. I've been with my boyfriend for over 2 years and everything was alright except lately it has just been very dull but I didn't necessarily lost my feelings for him. He doesn't go to my school (we're in high school) and I only see him probably 2x a week.
Last week, I met another guy from my school outside of school, just to hang out. (I knew him since 2 years ago). And it was cool, and I thought I was starting to have feelings for him. After a while, he told me he liked me and he kissed me.
So now..I am debating whether to break up with my boyfriend or not. I was really going to but when we discussed it I started crying. I don't plan on telling him about the part where I cheated. He told me that it was my choice if I wanted to. He's really sweet and funny. And I'm scared that I will regret it. But at the same time I don't feel like I deserve him anymore since..yeah. If I do break up with him, I plan on staying single.
Thanks...