I thought of my partner being romantically involved with someone else

It shows you are capable of love. I lost that a long time ago after dating 20 women back to back for only a few weeks each.
Now days it wouldn't bother me at all if she had an affair, good for her.

It’s the same for me when I think about him being involved with someone else. Plus makes me feel like I’m going to vomit my guts out. Which has happened a time or two in the past while thinking about it.
😡🤢🤬🤮

That's far more normal/natural than wanting to share them with someone, imo.

It's not normal, or good, to fly into a rage like that.

Sounds normal to me

Makes sense

Did she have an affair?