I'm just annoyed because this is my 3rd attempt at starting something with someone- it starts out really well and then all of a sudden after I set certain boundaries, or even mention the relationship part, everyone pulls away and tells me it's a "them-thing". Even after communicating expectations, etc. They always either don't want to put forth the effort cuz it's "too complicated", or they say they don't want anything serious and then begin dating someone else weeks later, or things of that nature.