Some days I swear I'm married to the devil

So when my Joe (most of you know him as Stitch) started dating, he had just broken up with his high school sweetheart, his very first love. He hasn't talked to her since. He told me 2 years ago that if she came back into his life, he didn't know what he would do and that she was the only one I'd ever have to worry about him leaving me over, but not to stress about it cause they'd probably never talk again. Last night, he comes home and tells me that he looked her up on Myspace about a month ago, and last night she messaged him back. He gave her our phone number, and she said she'd call him today. He asked me how I felt about it, and I said I didn't know. This morning she txts him at like 9:00am. They haven't stopped txting the entire day. He gets this grin on his face everytime they start talking, and he tells me he feels weird talking to her in front of me. While we're at Wal-Mart, she calls him. She hears Drey and wants to talk to him. Drey doesn't want to talk to her, lol. She tells him that the only reason that she messaged him back was because she wanted to apologize for the way she ended things between them. He tells her IN FRONT OF ME AND MY CHILDREN that he wants to be friends because he can't stand to lose the only part of her he has left. He keeps on ignoring me, Drey, and Zayden to go talk to her. I know she has a fiance.. but this is still just.... blah! I know I probably shouldn't have, but I went and eavesdropped on the conversation he's having with her RIGHT NOW!!! outside in my mom and dad's driveway.. and all I could make out was "If I didn't have them, she'd be just another girl" and then "I want to be with her, but I want to stay in contact with you", and then he walked out of my hearing range....... I didn't know how I felt about it last night.. but everytime I hear that dang "driiiinng driiiing" of the cell phone, and him smiling like the biggest dumbass I've ever seen.. I can't help but scream "BIIIIITTTCHHHHHHH!!!! (@#$@ you!!!!" in my head. I'm not even supposed to be typing this.. or telling anyone.. cause he knows my family (especially my mom) would shit bricks and then beat him to death for it. How is this fair to me? I've always felt like I was competing with a memory because of what he told me when we first got married, and now she's back in his life.. and I feel like I'm playing second best. As soon as she comes into the picture, I take back burner as do my children. Do I have every right to be pissed off? or am I blowing this whole thing out of proportion. BTW---- If you're reading this, PLEASE don't discuss it with anyone else but me. Considering you're the only one I'm letting read this Tausha, please don't tell grandma or anyone... PLEASE!