What: how should I solve this?

I have this online/long distance relationship with my boyfriend of a wonderful year. 5 months after, or so, I met this other kid, who is quite a few years younger than me, and we became friends. We bonded slowly and I told him everything, including how sweet and loving my boyfriend was. Few months back me and this boy were texting and he said he was horny. I was amused, and thought nothing of it. He’s always had this thing for me, but I told him I never approved of his feelings, and that I love my boyfriend and nothing would ever happen between us. I, just teasingly, texted him back, asking him what he would do if he were having sex with a girl (and I never specifically stated ‘me’) but I guess he thought I was, and we “sexted” for about an hour, until I went to bed. This sexting was completely harmless, on my part, and I was just interested on his take of sex with a girl, and the details. The “sexting” never honestly meant anything to me, but I felt really horrible after, I felt really guilty for “sexting” with my guy friend, thinking I cheated on my boyfriend. I honestly forgot about it, and my guy friend for a couple of months, as it truly never meant anything to me, but sometimes the guilt creeps up on me, and I don’t know what to do. I really do love my boyfriend; was what I did considered cheating? Partially cheating…or? I just had to get it off my shoulders, and now that I reread this, it doesn’t really seem like that big of a deal, but the guilt still gets to me sometimes. What should I do? Any ideas? And please, I’m looking for serious answers.