Jealousy and Murder

My boyfriend plays an online game called Evony. Which is cute and nerdy. The thing I have a problem with? The chick who keeps messaging him. First of all, he never told me they were texting. And he doesn't have to tell me everything. But she's some 23 year old from North Carolina who gets TOO personal. I came across a text from him saying "Hey i'm lonely, need someone to talk to." and she said "I'm always here to talk to you ;) love ya!" and then went on to say she could send him pictures, but she hopes I dont find out and get mad. At this point I was like WHO THE H*ll DOES THIS SKANK THINK SHE IS? WHY THE H*ll IS SHE SPEAKING TO MY BOYFRIEND OF OVER 2 YEARS? I WILL CUT HER. I told myself to calm down, cause I never get jealous. But she was meddling where she shouldnt be. And i was (am) p*ss*d. I'll be damned if she'll get in between us. Cause if she tries, i'll kick her in the face and make her eat dirt.