I've been in a relationship around 7 years or so. In the beginning, we would have sex all the time, but now the sex has tapered off, and she is never in the mood anymore.

There is a guy at work, who I noticed came up in conversation a lot whenever he did his 'usual stupid antics'. And I think she noticed I was getting uncomfortable with how much she was mentioning him and stopped. However, she's known me for as long as she's worked in this place and this dude and I have never met.

We're going on vacation soon and she set up a night for us to go out, but then as a surprise, also invited this dude along. She says this dude has always wanted to meet me and this would be the first opportunity to do it. She wants to introduce me to him.

She will occasionally bring up how excited she is about this upcoming outing, and how excited this dude is to meet me. I ask her laughingly why he would be so excited to meet me and she tells me 'Well he and I have been really close at work, and its just like how you would want to introduce me to your sister!'

I just feel like there's a whole lot of red flags and something is amiss here, even if something overtly isn't happening behind the scenes. I just feel VERY uncomfortable about meeting this dude and not sure how best to approach that night, knowing I'll feel very awkward and weird.