<human>: Condense the text into a few key points

This summer I moved to a new city to begin a new job. It was a great career move, but crazy lifestyle (4 days/week business travel, 70-80 hours a week of work). Since I'm away most of the week and the lifestyle is so crazy, I have mostly bonded/made friends with my coworkers. We generally travel to different places, so I don't see them on a day-to-day, only on Fridays. 

During the summer, I was hooking up with a guy I met on okcupid sporadically (every couple of weeks or so). I found out that his roommate was also one of my coworkers (but had started a year earlier than I did). I didn't think too much of it. 

In late September I started hooking up with one of my coworkers. It started with just going home together after late parties and me leaving early, but soon we saw each other every weekend we were in town, I  stayed at his place every night. We started holding hands, he cooked me dinner ... things developed etc. Finally, last week he brought up the relationship question (very cute because he is all gruff and stoic) and said he could see me as his girlfriend. I agreed. 

In the last two months, I've hooked up with the other guy twice, on weekends when my now-boyfriend was away. Here's the problem (ah, dating coworkers): my boyfriend is now on a small team with the hookup's roommate. Boyfriend and my relationship is not yet common knowledge, but knowing how these things go, will be soon. I don't want the roommate telling my boyfriend about me hooking up with the other guy, I'd rather be the one to tell. But I get the sense that he would rather not know at all  -- so I don't want to volunteer the information. I know we weren't exclusive yet, but I still feel weird and guilty about it.
<bot>: I slept with someone before boyfriend and I were exclusive, and I'm worried someone else may tell him. Should I do it first?