Why do I feel this way?

1 Name: Anonymous 2019-01-05 21:05
I was playing a game yesterday with my partner, during which a person started talking very lewd in chat. They went along with it, sending lovey dovey messages and love hearts.

I left the server, I made an excuse out of it that I had to brush my teeth and run some errands (which I did, but I was putting off). I used this time to reflect a little. I came back to the game, my partner was still playing in that server and by now it was full and the game didn't let me rejoin. I played by myself in a new server until the match was over. They told me they added the person that was talking lewd to them in chat, because they sent them a friend request.

Today they told me they talked to this person via Steam for about an hour and found out all sorts of things about him such as their political views, their sexuality, their weight and height. I found this out and now I'm kind of upset. They assured me they don't find them attractive. But, for some reason I feel sad deep down. What should I do? Why do I feel this way? Is it justified for me to feel like this?
2 Name: Anonymous 2019-01-05 21:58
3 Name: Anonymous 2019-01-06 21:29
beats me.

Leave this field blank: