It’s pointless to even care or pay attention to what other people are doing unless as a source of inspiration or useful self reflection.
If all you do is sit there and sulk, take a look in the mirror, forget about the other person and really ask yourself why you care so much about relationships, not being in one, what your perceived value of a relationship is, what kind of lifestyle and person you want to meet, what efforts you are going to to put yourself in environments with other people and actually engage with them etc.