<human>: Could you distill the essence of the text into 1-3 sentences?

I've been screwed around on in the past and have a hard time trusting people. I genuinely believe my boyfriend loves me and wouldn't do anything to hurt our relationship but I'm constantly thinking things that happen are "signs" that he might be beginning to be interested in someone else, or wishing he was with them instead. 

For instance, tonight (NYE) one of his female coworkers who didn't get the day off texted him on her break saying "Hope you have a happy New Years!" and he texted her back that he hopes work goes easy for her tonight.  I casually asked him if they talked a lot outside of work a lot and he said he doesn't really talk to her at work let alone outside of work, they're just acquaintances that rarely even see each other, and that another coworker has been sleeping with her (the guy told him). I asked why she has his phone number and he says he doesn't remember how she ended up with it. Even if they exchanged numbers during conversation at work it would be fine, but the fact that he says he can't remember made me get all... overthinky. She just got hired about 3 months ago and was immediately on his fb, too. I know chances are they just exchanged numbers for some unimportant reason and are fb friends because they work together, she doesn't even seem like his type at all. When I told him it was weird he had his coworker's number that he says he "barely talks to" he showed me the whole text (he only had one text on his phone from her, the one she sent tonight) but I can't stop thinking "What if he asked her for her phone number?, What if he deleted the other texts?, Did he look her up on FB? Why is she texting him on her break if they don't know each other very well?" 

That's just one example of many, and I don't make a big deal out of it to him whenever I feel this way, I just keep it to myself, but I don't know how to stop being suspicious all the time and feeling like he's hiding something. These thoughts and my mind playing detective all the time is driving me crazy!!
<bot>: I know my boyfriend loves me a lot, but I'm always really suspicious and think of the worst case scenario with any story that seems to have "holes" in it and I don't know how to stop these thoughts.