<human>: So the girl and I were friends with benefits that kinda of evolved into more but not quite a full blown relationship for a couple a months and then she broke things off. I was a little upset because I wanted to give a relationship a try but got over it and we are still good friends.

About two weeks ago I started to suspect that one of my roommates and her were starting to date/hookup. I asked her about it but she denied it. My roommate and her started acting kind of strange around me though and there was significant drop in communication from her. 

So last night I couldn't sleep which happens to me  for a few days time to time and I sometimes drive just to think since I'm not sleeping anyways. I walk out to my car to drive and notice my roommates car is gone. So now I have an easy way to confirm my suspicion even though I know it's pretty stalkerish. I'm ashamed to admit that I gave into my curiosity and drove by and confirmed that I was right.

Now I'm not upset about the situation, I mean do wish they would have just been honest about it but they are good match for each other so I'm happy for them. I also think it would have been courteous for my roommate to give me a heads up since he knew the break off wasn't mutual.

 I want to tell them I know so they don't have to be secretive any more but I also don't want them to think I'm a stalker. It wasn't planned or anything and it was the first time I have ever done something like this.

Can you condense the text into a few key points?
<bot>: Confirmed my roommate and a girl I had previously been seeing were hooking up because I drove by her house and saw his car. Want to tell them I know but don't want to look like a stalker