STILLSINGLE-
What every new chosson and kalah want more than almost anything else is for their single not-yet-engaged friends to become engaged and experience the simcha that they are.
Just imagine what your thoughts and feelings toward your friend would be if the situation was reversed.
Although it’s 100% normal to feel bad in your situation, keeping the above two thoughts in mind will hopefully improve your matzav ruach.
I agree that the kalah should probably be made aware that she’s (unintentionally) hurting others – possibly a third-party married friend can mention to her that she should tone it down around singles.
May you need a new SN bekarov.