180 Counterproductive?

[oops13]

We all work together, actually. I got a job in this department on a different team from OM. She was unhappy at work, so she started looking over here some in my department and OMs team had an opening. She didn't know him at the time. Their team took a chance on her (taking this job was a huge leap and she's been under incredible stress trying to learn) and he was assigned as her mentor. He did a great job teaching her...she's been in that job about 2 years now. Others around the office have even made jokes that they're a cute couple, etc. Eventually she started exercising with him, and sharing interests that she never got into with me like podcasts, talking about family, book club, he taught her how to play golf, etc. Now they flirt and talk a lot and shes putting energy into him and not me since late 2018. They did a half marathon together this weekend, and she told me she didn't want me to attend to support her. They're getting lunch together/for each other, bringing each other coffee, etc. from what I know but she's hidden all this from me. I'm reasonably sure shes confiding all of this to him (her IC, our frictions) and he's probably telling her to chase her feelings.

In the past, we've had dinner with him and his wife, watched their pets, been to their house to learn how to watch the pets, etc. He's also more "alpha" around here socially because of how our teams function. I'm not close to his wife or particularly close to him, and I think he doesn't like me and has told her I'm weird and probably undermining our relationship now. I used to be invited to happy hours from his team, now I'm not.

While I was miserable to be around, he was nurturing her.