<human>: So, long story short, my boyfriend Neil slept with my roommate John 3 weeks after Neil and I broke up (lasted for a month, we both learned a lot, and decided to try building the relationship again), claiming he was in despair and had little hope that we'd ever get back together. Naturally, I was very upset with the news, as my roommate lied by omission by saying nothing about it during the month that Neil and I were separated, which I felt was a huge disrespect to me.

Now that we're back together, I've made it clear that I don't feel comfortable with them hanging out one on one, and they've agreed to not do so until things become less tense (and to be perfectly honest, I'll ever be comfortable with it).

My issue currently though, is that I get uncomfortable whenever it's just us three in the apartment; where Neil and John are talking and laughing together while I feel tense and awkward. What should I do to address the the matter without looking like a possessive, paranoid control freak? I've set boundaries already, but it seems like I may need advice; help me please. :(

Summarize the given text in a few sentences.
<bot>: I'm uncomfortable with my roommate and boyfriend being around each other because of recent sexual history; what are healthy boundaries and ways to deal with this WITHOUT having to move out or coming across as a control freak?