Am I Emotionally Cheating?

Me and my boyfriend have been dating almost 6 months and lately we’ve been fighting and arguing a lot, but there’s no hiding how much I love him.
Here’s the issue…there’s one guy. I’ve seen him at a few things school related and I stumbled soon him on FAceboOk and added him. We got to talking and he’s really smart and cute and he’s not afraid to show his emotions, which has been my main issue regarding my boyfriend.
I’ve been texting him for a few days and we’ve made a connection. I know I would never cheat on my boyfriend, but I can’t help but have at least the tiniest crush on him.

What am I supposed to do?
I’m worried. It’s like I can’t control my heart. I know it’s not physical cheating but I know it’s wrong…

Help…?