We need to talk (Revamped)

What is happening to my life???

I'm way too emotional for my own good, and I don't even know why.
First, do you guys remember THAT JERK? Well, for now, since I'm far from mad at him, we'll call him TC (his initials.)
So, here's how it started:
I was spending the night at Bay's house and we texted TC. He told me he loved Bay. So, I started saying he was IN LOVE with Bay. Meanwhile, we would look at each other and start smiling. B, my best friend, told me I was flirting with him, and that he was flirting with me.
And so I texted him, and I told him what B had said. Here's the conversation:
TC: I think we kinda like each other
Me: You think you kinda like me?
TC: I was jk..I wanted to see what you would say.
But I actually think like deep down we have feelings for each other or whatever.

So, I had to admit to myself I maybe kinda liked him. And that makes me a bad person, because I have a fluffin boyfriend! This happened last time too. I'm betraying my boyfriend because my heart is confused.

Now, to the situation with B. She said she had a secret... and the secret was that she liked my boyfriend. So, I started crying because I'm a bad person, again. My best friend likes my boyfriend! I went and swooped down to get him, and that makes me a bad, bad person.
I am so SICK of hurting people. I'm done being selfish. I think I should just break up with him, since my best friend likes him and I like someone else. WHAT THE HECK IS WRONG WITH ME?!
AND my best friend is an emotional wreck and I don't know how to help her. We're both sad and confused and angry and I just want to kill someone.

And I already know my relationships with people are going down the drain. I'm just so confused and scared and emotional and I just can't stop crying. EEEGHGHGH.
So that's why I'm an emotional wreck. Love you. Bye.
xx Mack