Confused

Okay so on thursday the bitch was posting status' about me on facebook slagging me off and calling me a skank which I just found highly amusing. But then on friday she hunted me down in college and started ranting at me and calling me a back stabbing bitch and such and said if I'm going to bitch about someone to do it to there face and then she went on to bitch about the llamacorn when he wasn't even there, he was nearby but not that she could see. During this rant I bearly looked at her or said anything, if anything I looked at one of my friends that were sitting on a nearby table more than I looked at her, mainly because the look on my friends face was highly amusing.
Anyway then at the end of day after chemistry the bitch and her little "pet" ambushed me, like all I wanted to do was go home and take a bath, but no I had to deal with people again, anyway they showed me texts the llamacorn had sent them and it turns out what the bitch was saying about him was true.
So I went to ground floor where the llamacorn and a bunch of my friends had been waiting for me and a couple of my other friends which were stuck upstairs because of the bitch attack. I left the building with my best friend while ignoring the llamacorn so him and the rest of my friends followed. Clearly the llamacorn realised something was up becuase he came up to me and asked what they had said, probably assuming the worst.
So I told him that they showed me messages off him and he asked what they said so I told him that I saw a message that said he was only staying with me because he didn't want the shit before the exams and then he said well if that was true now why would I be so angry that they are annoying you.
But that's not the only the only text I saw. I saw ones saying he was 99.9% sure we weren't together and I didn't see these ones but apparintly he said he would put money on that she was better in bed then me (which would more than likely be true since she is a whore and I'm a virgin) and apparintly he said he was going to break up with me for her and he told people in her biology class that he was single.
Anyway then after he left I got a text saying "But believe what you want.cause tbh im sick of having to keep looking over my shoulder to watch my back from every angle.tbh if i meant that i wouldnt leave you cause of all the shit id get. Id of left you when all this started cause it couldnt get any worse"
And I really want to trust him because I know that bitch has been interfering with all his relationships since they broke up and all she wants is for me to break up with him so she can try and get with him but I can't help but still think that he sent those texts which means everytime I thought he didn't care I was actually right but now I'm just sitting here upset, I'm not going to break up with him, at least not yet, i just want to know that he cares and he isn't going to say things like that again... I guess I need to talk to him...