You’re not wrong at all. And you should also immediately show Rodney those text messages. This will do 4 things:
1) It’ll guarantee your boyfriend doesn’t cheat with her. Once Rodney is involved, he will watch his woman more closely and make sure she’s not up to no good.
2) it’ll scare the girl (the hoe) off. She won’t want to sleep with your boyfriend if she knows you bite to kill, so to speak. She’ll be afraid to mess with your boyfriend and she’ll choose “easier game” next time around.
3) It’ll give you the excuse to not hang around them anymore without you simply looking like a b*tch.
4) It’s simply the right thing to do. Don’t you think Rodney has the right to know his woman is actively trying to cheat on him? I do. I think he deserves to know. You have a moral obligation to tell him, honestly.
(NOTE: Obviously, when you tell Rodney, you should be very clear that you read the texts and your boyfriend has rejected her and ignored it, so that way Rodney won’t be mad at HIM.)
Also, Craig has a valid point. It’s quite possible your boyfriend deleted his sent messages to her. I’m not saying your boyfriend is guilty and obviously you shouldn’t tell Rodney he’s guilty, but in your own mind, you need to not be so naively blindly trusting. The fact he has these texts from her and didn’t IMMEDIATELYYY come to you, should set off a huge red flag. Be smart!