Bentzion: You asked “What does everyone here think of young couples inviting each other over for Seudas on Shabbos?”
I told you what I think. For my wife and I, we have our way of doing things. This doesnt mean what we do is what everyone should do. It is what I think works for us.
After asking the forum what we think, you told us what you think.
“Personally I think it’s a nice thing as new friendships are made,”
And then you told us what “someone” thinks.
“but someone told me that it’s the wrong thing to do as it causes jealousy (wife, apartment etc).”
I chose to answer your question, not opine on what you or someone else thinks. That is for you and your spouse or for someone and his/her spouse to discuss.